Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b121059e92b660…

MALICIOUS

PDF

78.6 KB Created: 2021-09-06 09:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aa3e27adbb8c4dd0d568068efcc70003 SHA-1: b5d07f13cf45908e2e5f076b81c09b2e94413a48 SHA-256: e1b121059e92b6602276c286465187708bca7d5c6424c33eb72a597bc140d7f3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by numerous links pointing to external websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery. No scripts were extracted, but the extensive use of external links and compromised hosting points to a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f37e0738d---9747387840.pdf In PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/wigiwerowep.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/84a0569a80f006b4629bd0a481184a07/8899168797.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/5ff1847c3776d00a39c0ad80446886c8/7089161663.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/wowajezinipawetunuvo.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/fofifusozokabodezidomil.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc814b49e3---69549312781.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/guwurezubonemakonoto.pdfIn PDF document text
    • https://apizf.org/public/file/62342366595.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/tamixefomefegedal.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/bifo24o4bsd9p1g7q619jakgro/fiwajusinipepojetowasi.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/6a23e46c525ff63bd1a3e31398f1d9f7/jazizenekevadidegaz.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/93412657073.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71432a99c7---jojowedowik.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3imkunfh6mmsstt81kdvthmq9v/sabawewerikuwusowudagifob.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611dc0037a3e9---bixotozajobapilulovaviwi.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608108532cd1c---59529000929.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610e7b136a2f7---wavorumuvamez.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/39620380010.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/pilebipojizomub.pdfIn PDF document text
    • http://dzbnf.com/upload/file///46468692507.pdfIn PDF document text
    • http://orlickachata.cz/files/files/22394296630.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/23516799747.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/da093d2f4a9951e7d76da430b921c4de/pijowo.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/55524829591.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc65bc864---26774380366.pdfIn PDF document text
    • http://jacksonreunion.org/clients/71346/File/27722794971.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fiqh+ul+hadith+in+urdu+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 10604 bytes
SHA-256: b8718b62bb24dbd1fe827e0cef2429ecaf8448f3a815c75cf1e4bcbd58ef338b
font_02_sfnt_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 17916 bytes
SHA-256: 506c31fbeec55622aa01d593a43bc287ca1899a44fe25899d585f639342c717f

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