Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a3071eb85fc256…

MALICIOUS

PDF

72.1 KB Created: 2021-02-27 05:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 75a491718e0792e1566d1780eadd8575 SHA-1: 1c7fee1a1198fe818157865203b73f3199a27535 SHA-256: 65a3071eb85fc25677673b852a5806c6aea984c3d591f2c44e1944acd961c241
186 Risk Score

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://golowaki.ru/award?keyword=origins+of+totalitarianism+quotes PDF link annotation
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/lawagaxozi.pdfIn PDF document text
    • https://xamubamujizej.weebly.com/uploads/1/3/1/4/131483378/f084161.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/natuzovixifimetimoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/wijenipa/g3uxbhe/78341078740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_601887c6aabd9.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/pikesezugetemirapad.pdfIn PDF document text
    • https://repitosa.weebly.com/uploads/1/3/2/6/132681506/037fa0c81.pdfIn PDF document text
    • https://ziganuridu.weebly.com/uploads/1/3/0/8/130815115/zunisonariro_godozupenizabe.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/5407440.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/Tqji2ig/dibewadazuxuxawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486346/normal_602b8fcea9c61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5ff79d247d061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460963/normal_5ffc6c7c854f6.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/ce2881134267d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5ff45fdd2f3b0.pdfIn PDF document text
    • https://dafalozurevibi.weebly.com/uploads/1/3/4/3/134308304/7011596.pdfIn PDF document text
    • https://kesadoxiluxar.weebly.com/uploads/1/3/5/9/135974677/nalopo_naruzamixotege_sodegitavukejag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/former_wisconsin_badgers_in_nfl.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 5240 bytes
SHA-256: 4e4179ac1cb9be1b5e7e05839ec58f4158bfe78cfc527b2cddcb6b6e319c2465
font_01_sfnt_off0000f10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 10000 bytes
SHA-256: a7deec00f3d6120a5caecf7b216251e1fb7128a16408c930c809ee7ea3af9243

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