Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c68498321ebf773…

MALICIOUS

PDF

70.9 KB Created: 2021-05-11 19:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1efc3332a6b0c48a4392af102bf781c0 SHA-1: b394b7bc96744040b25c8681a1ed04e1d20a656d SHA-256: 6c68498321ebf7739b12c0d31b894b6f8307bc304b6c76e6c43a78bf564c7c3a
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 large number of external links, identified as a link farm. The primary URL, 'https://kuzutuzo.ru/strik?utm_term=how+do+i+program+my+genie+remote+for+directv', suggests a lure related to programming a remote control. The heuristic 'PDF_SEO_LINK_FARM' indicates the document's purpose is to generate SEO traffic or distribute content via numerous links, some hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://kuzutuzo.ru/strik?utm_term=how+do+i+program+my+genie+remote+for+directv PDF link annotation
    • https://cdn.sqhk.co/gutemokerezo/NlihjYp/smart_tv_best_buy_65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_6013335e7c5d3.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/yhajehi/xidofinopegurizuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_6048162f8d14d.pdfIn PDF document text
    • http://wolotalute.iblogger.org/guideline_tb_paru.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/hanq29a/heavy_metal_boy_names.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/Zidjjif/tasimabeverum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_604d755712b66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5feebbbc794f4.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/UFbebCS/dodarabami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifanijuw.epizy.com/atomic_force_microscopy_eaton_west.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/what_is_online_proctoring.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_67c0adcad8f94165ab379578d66fd1d3.pdf?index=trueIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_e93139418ebc4fa6a114a3b59de859a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/kovarixezexawexajo.pdfIn PDF document text
    • http://gokegufokefewev.rf.gd/equidad_de_genero_onu.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_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 5480 bytes
SHA-256: 45360a0e32ce08b12bd8d1696eec3c3f66727d88ff8a61688f6e9a4afa4df4b8
font_01_sfnt_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 10008 bytes
SHA-256: c2847439f5b165c756538584cb599508784435aa8e8c90d0d1ec7ab0f23dafed

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