Malicious PDF — malware analysis report

Static analysis result for SHA-256 9568d2e8c9e3ade6…

MALICIOUS

PDF

73.5 KB Created: 2021-01-27 20:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b4308bc8010862d552ce187908354d10 SHA-1: 1f36bd554eb421b61a34b9ff5156645d1036c045 SHA-256: 9568d2e8c9e3ade6351fef897517a54214bb621ba656cc28d21d49dfc5bfc362
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of an SEO spam or phishing campaign designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains references to 'Sql made easy pdf' and the wkhtmltopdf application, which is often used to generate PDFs from web content, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=sql+made+easy+pdf PDF link annotation
    • https://cdn.sqhk.co/wedegetuso/eOhbidU/nfl_cardboard_cutouts_price.pdfIn PDF document text
    • https://pegepujime.weebly.com/uploads/1/3/1/4/131453637/riliji_baburewij_jolumu.pdfIn PDF document text
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/2917613.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/zyifhiV/73462259925.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/hgVifii/amazing_space_facts_you_didn_t_know.pdfIn PDF document text
    • http://mmeueue.space/manuxeritipojdqsw.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/9291521.pdfIn PDF document text
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/xanifagataru_xiwemobepewa_dosuwuran_rudotolepasez.pdfIn PDF document text
    • https://voxujoponita.weebly.com/uploads/1/3/1/6/131607404/d030f2e.pdfIn PDF document text
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/8103217.pdfIn PDF document text
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/a4321b2695241e.pdfIn PDF document text
    • https://lagomide.weebly.com/uploads/1/3/5/3/135304015/kanasel_januzi.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/durufotore_dewutineko.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/BCigZhc/italian_musical_term_for_brisk_lively_manner.pdfIn PDF document text
    • https://domilejoxu.weebly.com/uploads/1/3/4/5/134529458/3578338.pdfIn PDF document text
    • https://bodokevusigow.weebly.com/uploads/1/3/2/7/132740435/vowoligokoz-lesavaseju-bajaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tawovojo/outlook_default_email_format_html.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/superannuation_standard_choice_form.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 5420 bytes
SHA-256: 6a39dcdb207c40cfeb28a724373cc52142d4a29a1294774ef0c8b76c5dd0fbda
font_01_sfnt_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 10436 bytes
SHA-256: 394e03b2b048f59c76315d9e3f2925b6198de330471f463a8272992c91a12909

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