Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a409ac5918746c…

MALICIOUS

PDF

86.0 KB Created: 2021-03-21 06:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 27a4932923ec4f243dde64d2b4e7e8d8 SHA-1: 793a938f4f7a445f7f4bdca832ec0f484dcaf7a6 SHA-256: f3a409ac5918746c235fc2d58f969a47e5518a481305523fc966a1974d4f4571
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm nature of the PDF point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=grim+dawn+conjurer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465263/normal_6000bd7d1c228.pdfIn PDF document text
    • http://specrazreshenie.com/848960454351oag7.pdfIn PDF document text
    • https://xaliwituxezaxe.weebly.com/uploads/1/3/5/3/135323019/d9a07f198fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_604064772288f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404313/normal_5ff9b1f4df60a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_60445ede98eec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_6029573c165f0.pdfIn PDF document text
    • http://balifruit.com/gedarn19j1.pdfIn PDF document text
    • http://insurancecarusa.com/31351068845evu7j.pdfIn PDF document text
    • http://smm-target.ru/cal_spas_parts_listyy3a3.pdfIn PDF document text
    • https://jobuvofuwado.weebly.com/uploads/1/3/1/4/131483112/xupovojilimoma.pdfIn PDF document text
    • http://stonersfranchise.com/risk_analysis_methods_journalwyvdx.pdfIn PDF document text
    • http://lassituda.online/machine_learning_algorithms_in_python_codejb4k4.pdfIn PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/nolaregati-pafapatabu-budutin.pdfIn PDF document text
    • http://uniques.space/2003_jeep_liberty_cranks_but_will_not_starto23xw.pdfIn PDF document text
    • http://registrat.space/gixolirl3daj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5ffc284d68ee9.pdfIn PDF document text
    • http://selectgetc.top/keurig_model_b40_instructionsp9q44.pdfIn PDF document text
    • http://vwwv-avito.online/pirepimelapapunopapurkfwt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_6047d960281a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459780/normal_5fcd1a5d2f8c8.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/fawapa.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/50fcccfb-aa2f-49fa-bae5-f30896f83d3d/beginner_english_grammar_test_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c7fd3d-6d2c-4bfb-8b48-0b9680f9c375/tezedo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 5072 bytes
SHA-256: e2d8c5aee1df1e158666f61556b5034ed3f5a755226f6b1053ed0ab632a7a91c
font_01_sfnt_off000123a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A1 11352 bytes
SHA-256: b942b7c6486b150cb26bdbb98f7ab7fa80f6e10c19572545fd6b2605e0ddbdcb

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