Malicious PDF — malware analysis report

Static analysis result for SHA-256 947471a94ce38000…

MALICIOUS

PDF

71.3 KB Created: 2020-11-28 23:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fd014d4835ef4e886e5ec8df24610e7f SHA-1: 254bd7ed350b649156e3331b240e5c6ba68d3d14 SHA-256: 947471a94ce3800091d2755a010156b063b419370ce29eb95e9f01078da46b96
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with a primary redirector URL pointing to 'trafffe.ru'. This suggests an attempt to direct users to malicious sites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=art+pro+mpa+ii+mod PDF link annotation
    • https://fapusazi.weebly.com/uploads/1/3/4/8/134849501/busafevajuzun_bezotokezabuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5fb60d080c457.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/8995262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fa858a02249e.pdfIn PDF document text
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/pufuvurevumagigeb.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.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/eafa3d38-c784-46a6-bdc7-4411f4cc4b14/pejibudezafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e689fca6-cfb8-4ffe-905a-4737c9921722/navy_uniform_regulations_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e578d5fc-86b8-4344-85d5-35d93b96d859/kujikixoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7135638a-d7fe-4b64-ba99-2eaf386b5169/30115411820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2697db1-1d56-443b-b1ec-2f0e9e7b1699/folipinanotetabub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a1721e-7824-41fa-9c34-e6ac4ee31576/vupoxisuxifefibonukasar.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_off0000cf98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF98 3084 bytes
SHA-256: 8d9dfb8357c9a5018bbc1283d30e92ce03b289202c9564f76d7bac960a8487d8
font_01_sfnt_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 4884 bytes
SHA-256: 32d2afecdb675b3752b1a2f21dd9908796b6973d1346b2202d8477a0746bb6f7
font_02_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 10908 bytes
SHA-256: 9a09aba9f3e5ca29d4f50b45f6d2a3da0b4f5e8fc25a0dcd6aea15ce5210bbc9

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