Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc5299707af56b8…

MALICIOUS

PDF

67.4 KB Created: 2020-11-20 04:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cf9e91fe6814638b733eec2bdee0790c SHA-1: c573d0c714569fe965ec11107e54a7dab72b806f SHA-256: 5fc5299707af56b8b2512900fba82fcafa6482e7888f2b804809d4e3b47fdf5b
262 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, specifically `https://ggtraff.ru/123?utm_term=panzer+general+3+manual`. The document body, though heavily obfuscated, appears to be a lure related to a 'Panzer general 3 manual'. Heuristics indicate this is a malicious redirector and part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/123?utm_term=panzer+general+3+manual In PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/lorubavevotu.pdfIn PDF document text
    • https://pugerazetowed.weebly.com/uploads/1/3/4/3/134341851/2982308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fa2ce70b3498.pdfIn PDF document text
    • https://jonurimexiv.weebly.com/uploads/1/3/4/3/134321783/2752429.pdfIn PDF document text
    • https://zuforupixonop.weebly.com/uploads/1/3/4/3/134394080/b96f05e42ce6.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4918653.pdfIn PDF document text
    • https://pefemodadiz.weebly.com/uploads/1/3/4/5/134520562/5b4f8694eafe1.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/dojivewobasuval/jifemamonudowowuduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f36c293-7857-4d87-858b-892dc1e246aa/solicitud_de_comipems_2019_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/nfl_fantasy_draft_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/basic_english_speaking_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880c8b6f-73d6-4b07-91fc-606fedcd3479/java_projects_with_source_code.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/linewegegujumisadajejedi.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/85746454059.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/kobaduvuragawepem.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_off0000c98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98D 5040 bytes
SHA-256: 4b52ad92bd26822ef091cb0cd21cad7fa7df42eb5c9dd9db0cb5d1c202aebf07
font_01_sfnt_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 11612 bytes
SHA-256: 40cb70ca1119965301cb3e95c721a977228cebabaccbb32ef31b04108e7431f4

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