Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4fb35a7ed265aa…

MALICIOUS

PDF

78.4 KB Created: 2020-12-26 23:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fb628313256861550b8b18e8b2aef8c5 SHA-1: 976b8021479604d7be320769196712d02f98af05 SHA-256: cf4fb35a7ed265aaab751d0aaf3e8bf20563b631890b7962daf57086222128ad
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a redirector and a link farm. The primary malicious URL, 'https://traffmen.ru/123?utm_term=mona+lisa+lyrics+valntn', suggests a phishing or scam lure, potentially disguised as search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or leading users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=mona+lisa+lyrics+valntn In PDF document text
    • https://notuvovezed.weebly.com/uploads/1/3/1/3/131382721/binegud-lodotofonosot-nolotubukisig-buketetepedax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_5fc105674d6e1.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/jjhctBb/gilijopagefama.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/ieP6Ste/98212317781.pdfIn PDF document text
    • https://busaluvugisegiw.weebly.com/uploads/1/3/4/3/134368440/5716e2d10135b.pdfIn PDF document text
    • https://cdn.sqhk.co/pusobatosip/Bjeiejj/black_friday_deals_best_buy_ad.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/ZPhhqEQ/the_factory_jersey_city_owner.pdfIn PDF document text
    • https://cdn.sqhk.co/fakobijo/fhchbxB/79111915614.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/semoze-juzelorari.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e998f126-72fb-4c0e-9cf7-993c617fcf82/all_trig_identities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2aa55eb-eedf-4b76-8dd4-d32efa9ba36e/46929486054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aac7153-894b-490a-8de5-7b34cdb5928f/30034839923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc25ba3-3b3b-4784-b6c4-70be1d15939a/g12t-75_with_vintage_30.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21332656-a172-4eb6-a727-d9ee0ca4efce/test_dates_for_act_2019_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ed84ae-6886-4eac-857b-294c02f83fe8/63927013262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e42965-6068-4547-8459-903bd4a31196/woramere.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 4960 bytes
SHA-256: 9ee69f80faf3cc1b22875265205c21ecf28bc4d9d24455c353060f9732b5176b
font_02_sfnt_off00010551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10551 12320 bytes
SHA-256: 847079177797f3d7867115b84a701c4511b06e371e42fda82495eaff41e85dde

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