Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9303a3ab686814…

MALICIOUS

PDF

70.1 KB Created: 2020-12-19 07:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e72ac0487c2d0ce89631969b7c226911 SHA-1: 9e2b11b2ecb700c2b869969671cd436fc3c58138 SHA-256: bf9303a3ab6868143559f3f10bbe1051f12fe0a1afb26895b6564cd1efaee323
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous external links, many of which point to SEO redirectors designed to lure users to malicious websites. The primary redirector identified is 'https://trafffi.ru/strik?utm_term=lemonade+mouth+script+pdf', suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://trafffi.ru/strik?utm_term=lemonade+mouth+script+pdf PDF link annotation
    • https://simamofot.weebly.com/uploads/1/3/3/9/133997368/bdf0312.pdfIn PDF document text
    • https://butiziro.weebly.com/uploads/1/3/4/3/134308177/bumejezok_nupumumizap_mivavod_razetisaxov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_5fbf5bd26f521.pdfIn PDF document text
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/7ac460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417998/normal_5f9be6666a540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_5fb0339ba119b.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/toxamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f8bfe88f2107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470389/normal_5fc925335a546.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6f0e41969b523a41dae17/t/5fd6b47affab5d3c5606e329/1607906428052/58774089025.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54110c6d96458363eb566/t/5fcc80a9c836a917f9062df5/1607237801971/logevolezimazupojunemoti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d3e7a87939686429f1a7/t/5fc61a7ff8cdb769c6b42b1a/1606818432037/exorbitant_antonym_deutsch.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD350 5304 bytes
SHA-256: a0ff911b61884c2eb1cea772b4ebf28f6482c849adc0ad567e8b7e1610f811b7
font_01_sfnt_off0000e531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE531 11420 bytes
SHA-256: 0b5d6fa0364379910d594c3d8647f9250583a2713f7c11a2fab87c6deade499d

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