Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d4023d77852c1f…

MALICIOUS

PDF

81.0 KB Created: 2021-06-09 10:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ede595d0bed5f6fd220cd2688382b3c6 SHA-1: 6e69d088137111288202ff35ab4972de48253f1b SHA-256: 96d4023d77852c1fc01682d9292ad41f2feac4cae4d91e6572367331b3514131
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, pointing to various domains including disposable hosting services. This behavior, coupled with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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.
  • 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://philabc.ru/pbw?utm_term=bhimach+gan+dj+la+vajat PDF link annotation
    • https://vunabiripiboxuw.weebly.com/uploads/1/3/4/7/134756527/5b0fd385e43.pdfIn PDF document text
    • https://xunujilitaga.weebly.com/uploads/1/3/5/3/135315779/vowodopetoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_6042812051b2b.pdfIn PDF document text
    • https://nanukofufo.weebly.com/uploads/1/3/7/5/137516761/5257062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_60bee8280b759.pdfIn PDF document text
    • https://weroxodadugofu.weebly.com/uploads/1/3/4/5/134503620/220979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_60613a9d638e2.pdfIn PDF document text
    • https://jurisosisirebak.weebly.com/uploads/1/3/6/0/136086550/ragijo_kozivabi_rajixuvowego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445119/normal_5fe9f5cae619d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452618/normal_6050d51d25efb.pdfIn PDF document text
    • https://wuzipagaxu.weebly.com/uploads/1/3/0/7/130776492/0608f3a8fa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_6002c27a5d154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_603580f90e1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fd63c7074f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450640/normal_601e86134cd1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370087/normal_5ff674c653d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_5fd9358f10356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_6023fd52244bb.pdfIn PDF document text
    • https://zusonuxegaza.weebly.com/uploads/1/3/1/4/131437774/0826d5c727fea.pdfIn PDF document text
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/540edb190f887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_60242e1437dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_601525b386669.pdfIn PDF document text
    • https://gapemudumowew.weebly.com/uploads/1/3/1/4/131437765/vosunuxokonuvif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccda5550-0311-4453-8b48-b2fe368f1792/craftsman_table_saw_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8865247d-23cd-48c8-9a0d-3447187b053f/hasta_bakm_plan_rnekleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c36120bb-4bff-4103-92b1-d5ad39990d75/bobbie_ann_mason_shiloh_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84389464-c76e-4532-96a6-bb6ed29402a7/cbp_structured_interview_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 5264 bytes
SHA-256: d22ca9d1f423310c5133d267fa13f49e6b8b8b0d85cd4ba26ae36b25b5f90c30
font_01_sfnt_off0000fd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 11376 bytes
SHA-256: 97f6a6cceb28a2d915c5b2e26c7eb35df6f75df5788d3a4a8404e06bb828cfbb
font_02_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 4264 bytes
SHA-256: 39e8b480fdc67420153ef82fd9ca4c280f0dd9800a6679654dbeaea6b301762f

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