Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ce59be6d225674…

MALICIOUS

PDF

96.2 KB Created: 2021-07-03 03:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 336ab08a0da22aa42076f22c983a93a9 SHA-1: a2356aa99c85b34eaf3968405d7b046e1bc1dc56 SHA-256: b2ce59be6d225674656bc4bde6fca8f83bf85a68d005b7208172d72b16dded4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external links, including those pointing to compromised CMS uploads and disposable hosting, suggest a phishing or malware distribution campaign. The file's structure and embedded links indicate it is likely part of a spearphishing attachment attack, aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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 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 https://huntic.ru/uplcv?utm_term=when+is+the+pacquiao+fight PDF link annotation
    • http://barudan.hk/UploadFile/file/20210625222934552.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/31086289251.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/27912913808.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac755e0967f---linidi.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf6a2af09c---milexewapiragekusaxubi.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160918f0a98136---65953529002.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2976a49090---suzenedutuvekem.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/79997984862.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/39961573413.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775a234a787---73308123699.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095228a975b3---xijid.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/muxok.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0f72b1d19362f830a55dd350501d5c09/16679571823.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f25c7d6a7---zesijezixowawugokemuj.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5c69dd34f---71300794611.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210624132035_pl21p1.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/85674053327.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210529113649.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a072b5f0c1e---purafuwip.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/nfmp63osmd6gdiljbiknev48oe/37358975572.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/tewilebumedile.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/76871527562.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/gemomikodoziwokosobeka.pdfIn PDF document text
    • 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_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 10852 bytes
SHA-256: 99c2eea86fcea458e740a33179c86b403da43c98d5c6fcc72eb2dd29fd544275
font_02_sfnt_off00013994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13994 22728 bytes
SHA-256: df414f160e588e213fb3b3e68ce11f02d9b79928a0ba410943e61cf064c2f46f

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