Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42d1b1e4a12aa08…

MALICIOUS

PDF

73.6 KB Created: 2021-04-05 15:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 467ca99040612ac1130dab86cc4305dd SHA-1: 5ba7a040ff133df46699a3e6e39fa9e3ac445e5d SHA-256: f42d1b1e4a12aa08332004cb9b0b4bbe699feeb3f38b4d3e3c71668e55a26e92
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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 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://soxebez.ru/award?keyword=rosario+para+difuntos+con+cantos+pdf PDF link annotation
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/wikulegivar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_60342080ed3f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405950/normal_5fcf444885b5b.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/9877220061.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/logiwizowuwebib.pdfIn PDF document text
    • https://taxikifa.weebly.com/uploads/1/3/4/4/134496463/6329643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60665ba47b4ae.pdfIn PDF document text
    • http://xumugawejal.scienceontheweb.net/glossary_of_research_methodology_terms.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/kewinetoxevada.pdfIn PDF document text
    • https://fulotetaputu.weebly.com/uploads/1/3/2/7/132740707/e6f80.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/which_phones_work_with_tracfone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_6048e53642f99.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/b273f6d5-79e8-4c56-bdec-91b9db0610d2/line_6_pod_hd500.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/lobugitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f198e77d-011c-4944-9750-188d9a6d1a06/how_to_turn_off_service_light_on_bmw_x1.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/aroma_professional_20_cup_rice_cooker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21408278-ce89-4013-a78f-08a1f5203b2f/dusonidinazewurufugosaloz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511b0526-1713-4303-85b9-6c34b1e01d70/kokorudonasofaz.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_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 5124 bytes
SHA-256: 64337e158c30079fd85ab00bdcc0841df69133deb321793a8a3c0570fe02a28d
font_01_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 11872 bytes
SHA-256: 41468cb040503a3808193fb4ddc4719f81445219a9d6b95879702c331b067624

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