Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e52cc2b207ae6c2…

MALICIOUS

PDF

90.1 KB Created: 2021-08-16 15:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a8736d6aa481f7a1bcf51bde6af8ff49 SHA-1: ab9068be6350fef4d1fcfc87f26fd3947b00f92f SHA-256: 1e52cc2b207ae6c2cf42b2532b0fd44861d40114bf153a7b1533be5c62c05518
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URIs were found, with several pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the heuristics strongly indicate a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://parfumland.sk/upl/28882196057.pdf In PDF document text
    • https://keyseries.us/userfiles/file/tuxawebemoxin.pdfIn PDF document text
    • http://holzweiss.at/zusazufo.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/74546646353.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/68081235969.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/8fc3f0dd97fa31c0e78166b9b930a9a3/62388817501.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/30183520024.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/nowiwadadilaxozane.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/gekusomeweroxesu.pdfIn PDF document text
    • http://innotack.com/userfiles/file/kitot.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ed4c6565---439596234.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/xamalama.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/bulovibelesutale.pdfIn PDF document text
    • http://schubert-hh.de/image/file/nofivirogodibibig.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/pekirotiludibunu.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d6275ef923a24312177a0f76879411e5/15739894706.pdfIn PDF document text
    • http://khocabien.com/uploads/files/dalogosojasaru.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/51727531900.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160843db52f77d---46745974240.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/jexokivifatudajosufugu.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160825bd63bdcf---todogodora.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fc6947090---19626510003.pdfPDF link annotation
    • https://drsaman.com/files/pibupalegalumekixapenu.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/powutupijozab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=is+lucario+in+pokemon+emeraldPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac889d389bb---givopubamudogegapos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 17624 bytes
SHA-256: 4da4d26e103597299b5667f8854e0206c796295269c8f4b4bc321440b3a7f54e
font_01_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 10720 bytes
SHA-256: 7418f1e16456bc1ea8251b4251a91e0a6c41437c1499cfc89d40bb953ee80432
font_02_sfnt_off000136b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B3 2476 bytes
SHA-256: c5879530702ae49801caddfb4e80b3e4c32629b70922cd50eef05f18345f509a
font_03_sfnt_off0001418a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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