Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0c8bbb59415fd8…

MALICIOUS

PDF

74.8 KB Created: 2021-03-17 04:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6b207716c2e725062273a2b29f51c61c SHA-1: ba2e0ccf3c2b3e75a976fe8bd67ee36a9a49d7db SHA-256: 5a0c8bbb59415fd895958bdabbbf640fa95e42e137bc1f9d4f899cebe817cec0
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=pryor+junior+high PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412160/normal_603de968b858a.pdfIn PDF document text
    • https://rudoliretumuw.weebly.com/uploads/1/3/4/8/134861944/zexurepop-bavadamo-makarema-jiwefaz.pdfIn PDF document text
    • https://vebazefi.weebly.com/uploads/1/3/4/0/134040586/1f571566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_6015d6f6be6aa.pdfIn PDF document text
    • https://sofuwikomu.weebly.com/uploads/1/3/4/3/134308783/nopapugosimuteviri.pdfIn PDF document text
    • http://maska-respirator.shop/suxexepakigesazkg34w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_603de5d909ef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475738/normal_602c24a709eca.pdfIn PDF document text
    • http://mosquito.codes/7392735155251csi.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/9713521.pdfIn PDF document text
    • https://fonabanobegax.weebly.com/uploads/1/3/1/6/131636781/8896599.pdfIn PDF document text
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/famufesu.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/wixalakijibogin_zovizova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5fed14c64085f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_60330b483070a.pdfIn PDF document text
    • http://crubr.space/78377729817u7yc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412388/normal_601bc35f91b82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481055/normal_5fff1bb074531.pdfIn PDF document text
    • https://rixabala.weebly.com/uploads/1/3/4/7/134730828/e68f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_6049805561068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502178/normal_601b8b81c3d6a.pdfIn PDF document text
    • http://goldenframecollision.com/can_quantum_physics_predict_the_future61mpb.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_off0000e70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 4704 bytes
SHA-256: ff5d00b1f97694808c9854ae29c511f6727eff66e4a80c8ed06d08de8f2b5564
font_01_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 11232 bytes
SHA-256: 3e615a53f3af8d73f93c80a89d838be34943ed012382afe705bdfb1077f97d81