Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3dbb94d38a0322…

MALICIOUS

PDF

85.1 KB Created: 2021-06-01 02:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 70ef88930bbc8cc92b6630eaca8ad77d SHA-1: c07cd4aa7846775770c3320579c8cbfc52f2668b SHA-256: 3e3dbb94d38a0322166ba566deb9d7eb1bdaef8607a6692b4359b87c8a64eb73
186 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to external websites, masquerading as search results. The primary URL, 'https://irlanc.ru/pbw?utm_term=best+cheat+engine+for+android+no+root', suggests a phishing or scam attempt related to mobile game cheating. Heuristics indicate a significant number of external links, many hosted on disposable domains, further supporting a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://irlanc.ru/pbw?utm_term=best+cheat+engine+for+android+no+root PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485704/normal_60346bd139ae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379377/normal_5feb96be86981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_60673af49385b.pdfIn PDF document text
    • https://zidadosivifaju.weebly.com/uploads/1/3/0/7/130775619/revovaju-dekof-nogovawonitet-lepogebujok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_603a62bcb8bd5.pdfIn PDF document text
    • https://tufelonidozuwux.weebly.com/uploads/1/3/2/6/132681512/4330782.pdfIn PDF document text
    • https://fomuropuzukamu.weebly.com/uploads/1/3/4/7/134728801/772539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6047d68da61a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_60600b1905003.pdfIn PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/fofitesisufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_603d26d020a01.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/cc991e13-35ca-4268-95b7-495aae41b4ca/macbeth_act_1_scene_3_character_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb6b920-6a7a-42e0-9de3-c80bfa14b383/pofopusozejekibapivujuzob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8f45f6-7ebf-4b75-a5cf-22940c0643cb/how_to_find_a_15_tip.pdfIn PDF document text
    • http://faxamom.pbworks.com/f/how_to_make_your_own_soap_cutter.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/57930306757.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/does_granular_chlorine_have_stabilizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd8cbd4-b7c1-4ed0-a879-bc8c7e0ca63c/wenejevefesovujak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33088f8f-1c69-4d1e-b420-97825f577423/kugeruzupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4154676-aef4-4837-bfd4-418b5ff5a708/les_miserables_1998_plot_summary.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_off00010cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFE 5300 bytes
SHA-256: 661376c990a8837a67064873603d6a77d47ba272ce1353701d0dd6d8e8ce329c
font_01_sfnt_off00011f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F07 11448 bytes
SHA-256: c644f0dd84ef1097cfff41796fd70fd12252f7fe866c844f9533646dc404bc2f