Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a348baa3d89099…

MALICIOUS

PDF

87.3 KB Created: 2021-09-07 04:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: dca322fca34382c3d402f4a867885c4a SHA-1: ad10e8dc822ae4d8200513f31214e4d446ac95e4 SHA-256: 64a348baa3d890999c6e012c31d71cf69a439ab843ad89c73cbe894f2424f4de
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm pointing to compromised WordPress sites. The embedded URLs, including one using a raw IP address, suggest an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

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://ecohort.com/userfiles/files/miguniwokawazakokebor.pdf In PDF document text
    • https://alianzatours.com/imagenes/file/kizowevokaxunod.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/wosoji.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/purudojiledog.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/46806236723.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/0bthgsbf0krcbijkqq6b2sjqrr/bupixowewedomi.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cacee11763e---nulavupajof.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/32855693825.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b46370430---94146431178.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/49052285413.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/96188261612.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612bcab5701d0---medezedek.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160769a402a694---bupasilejefupesog.pdfPDF link annotation
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/bpeqk550ufienve3munjahdubs/56749456829.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/poputabijibizukolosofub.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e1b54a28538e5c99f0ffc8603ebbf8ad/88640486643.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/senedutomapenabukowag.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/woledotal.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/59487525698.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff688de77d---zonosivupiraxaj.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/93173854813.pdfIn PDF document text
    • https://epiphanych.com/images/file/zukawonetunuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=scaa+coffee+taster%27s+flavor+wheel+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 18568 bytes
SHA-256: 2e0794cd604f1f64dd067a41343bc95307ffb45a8b0bfd84bd43e894e90b2601
font_01_sfnt_off00011dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC8 10784 bytes
SHA-256: f140aa30be90895b8cc0d39aa85d5189b6db0f596eea6dbc35f84f19ed4591e8
font_02_sfnt_off000136e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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