Malicious PDF — malware analysis report

Static analysis result for SHA-256 5377a29a8cd6a2b7…

MALICIOUS

PDF

77.5 KB Created: 2021-06-03 02:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 018082014baf0cb735238db0a3a73805 SHA-1: 57c53c7a78a7f6394213d79b2e3f89cb1813ede9 SHA-256: 5377a29a8cd6a2b771f4b5e3519aee568939c29f8e88fd32230edad9a1606079
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, and contains a large number of external links, many hosted on disposable domains. The document body, though heavily obfuscated, appears to be a lure related to finding social media friends, directing users to a link farm. The presence of numerous external links suggests an attempt to redirect users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/pbw?utm_term=how+can+i+find+my+facebook+friends+on+snapchat PDF link annotation
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/rawuxemiligamikogado.pdfIn PDF document text
    • https://lobejimore.weebly.com/uploads/1/3/1/3/131383478/8722090.pdfIn PDF document text
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/fezojubo.pdfIn PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/varusa_subelaga.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/giwuzuw-nevaput.pdfIn PDF document text
    • https://xatufatug.weebly.com/uploads/1/3/4/5/134597760/wimedumarebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_602f5de55f6ac.pdfIn PDF document text
    • https://dakubotamijez.weebly.com/uploads/1/3/2/7/132712147/44f0c90e2.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/48adcffa22.pdfIn PDF document text
    • https://danimaxo.weebly.com/uploads/1/3/5/3/135388986/8386783.pdfIn PDF document text
    • https://vajepagipe.weebly.com/uploads/1/3/4/0/134000011/revaxijiwiduwak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6022931150d3f.pdfIn PDF document text
    • https://ditakusoboke.weebly.com/uploads/1/3/1/4/131437623/85219.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/zifogirixosise.pdfIn PDF document text
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/bixowufek.pdfIn PDF document text
    • https://puxupukesif.weebly.com/uploads/1/3/0/8/130813524/c709c312c33c.pdfIn PDF document text
    • https://mifafipuwekirej.weebly.com/uploads/1/3/5/3/135327035/8336725.pdfIn PDF document text
    • https://nakosedamewa.weebly.com/uploads/1/3/4/6/134612328/nulefowebogewigumum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5fe2b72be6d4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 5720 bytes
SHA-256: e559f741118e0f998a1ccae620cb10902557176f158b9234108254e66ade1992
font_01_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 10252 bytes
SHA-256: a8e6a2ba3e8d7ec9d83a412772de157c4c38089e015e2c66b6ec8d661a2d0bb6

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