Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f154938780ecf4f…

MALICIOUS

PDF

70.4 KB Created: 2020-12-15 05:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 26c0e22a82e437224a48b0f890f51e40 SHA-1: d579b50edd2bb295d85390632f28f33602e20bc2 SHA-256: 3f154938780ecf4f36904a8ff66b5a7f3bb5490d67986b0964e6b4d48c0ea3bc
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many of which are likely part of a link farm designed to direct users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=2008+jeep+commander+uconnect In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5fd2238676084.pdfIn PDF document text
    • https://jabanomazekapuf.weebly.com/uploads/1/3/4/7/134743752/3359282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369161/normal_5fc699bf45bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_5fbc9e1c10269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_5f94fb67e2dee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d5e69ba3-f8ae-41d8-be96-02855765bec0/all_animals_photos_with_names_free_d.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5166417e7202640051625/t/5fc966fc6c318e3cdc56e870/1607034620688/i_gladiator_money_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6627bb6d-41a6-470e-b3d8-398160caa61f/keto_ignite_fat_burner_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e26375-d7a3-49bb-b3f9-8fcae14d7d37/dawurexif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97310e5-48df-413e-9d45-5dcc0bab262a/26310732876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65014b2-7131-4bbe-8725-e49bab91d8f6/niruvawufipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6d4dd0-4336-44b1-a275-1aeb2e1bd8ca/bevojazesafuzo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 5292 bytes
SHA-256: be7a80e2e07ac06aa76abd1c8b7ca543012228bac40e61998a7217bf661e2064
font_01_sfnt_off0000dd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD05 9888 bytes
SHA-256: 2b853d0b9dbb13bde7718480767a07f25bad8d8b1217ead3ba1fe86e9c1d62b2
font_02_sfnt_off0000fefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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