Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bfc8f1c7db0ae1…

MALICIOUS

PDF

73.5 KB Created: 2021-04-04 11:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c28eed1470b53d3ff3448ebed4a200aa SHA-1: f7ae264d57c7387d63001be23368c209449bca09 SHA-256: d1bfc8f1c7db0ae176efb2a296b9b8663cb1c85c38b863789c3abe7b64588b48
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL being https://xezojetit.ru/wix?keyword=lab+puppies+for+sale+in+minnesota. The document body, though heavily obfuscated, suggests a lure related to 'lab puppies for sale'. The presence of many distinct hosts and links indicates a link farm, a common tactic for distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://xezojetit.ru/wix?keyword=lab+puppies+for+sale+in+minnesota PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419191/normal_60063388eec2d.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/wovojonejegulud_bazelige.pdfIn PDF document text
    • https://ronunafo.weebly.com/uploads/1/3/1/8/131856498/mevafolusapevew.pdfIn PDF document text
    • http://itchia.space/fakogukekagopalevu84dnv.pdfIn PDF document text
    • https://cdn.sqhk.co/zokirafuka/hhjgdjj/unicorn_colouring_sheets.pdfIn PDF document text
    • http://afracheat4.xyz/kafka_before_the_lawxq1qm.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/22017648965umhj4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5fe2979bd462e.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/jK0y47c/pejamuvuxez.pdfIn PDF document text
    • http://vinnipoh.fun/shab_e_barat_mein_nafil_namaz_padhne_ka_tarika92je0.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/sibizagepilax.pdfIn PDF document text
    • http://pedron.fun/ff_live_streaming_hari_ini_tv_onegw4bk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472775/normal_604e7b05cd7bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366397/normal_5fff7809d7011.pdfIn PDF document text
    • https://lefatelaxebaj.weebly.com/uploads/1/3/5/3/135398996/8911640.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/70ff498b-5084-4cf3-b506-d647002330dc/canon_200d_mark_ii_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b9c385-d8e5-44fc-a13a-50d5bb418901/22311300461.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_710e28b69cfe4c058e7b91ecd25cdbde.pdf?index=trueIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_4b755cd6126345519fc42507a8d45846.pdf?index=trueIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_61db401053674018bcf77709af9cd08e.pdf?index=trueIn 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_off0000e09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 5128 bytes
SHA-256: 61ff8ed3435beb31c01730547833201db4e33cb4dfa941626cf682a3e1a7539d
font_01_sfnt_off0000f1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 11300 bytes
SHA-256: 95a339da55126192efa7a0a4ba33c85bdcec080a4ba6400d75208c0f1c3a4330

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