Malicious PDF — malware analysis report

Static analysis result for SHA-256 e481101c4eb88427…

MALICIOUS

PDF

107.1 KB Created: 2021-03-22 12:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb8a201f2a04a8aefd173239232f8efe SHA-1: 959743255673bd7dfefcb4d4af65757ae95b0deb SHA-256: e481101c4eb88427104a676b751b4dd54756bb740a4deedb312dd89301d3c7d6
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 0.9997

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://jacksth.ru/award?keyword=arduino+code+for+servo+motor+control+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454673/normal_600b314e200f9.pdfIn PDF document text
    • http://webdefilmizle.com/65753298372yfzpx.pdfIn PDF document text
    • http://sportplays.ru/80715570131c4u1p.pdfIn PDF document text
    • https://senevabitup.weebly.com/uploads/1/3/4/2/134234896/rokofabunipa_fojurovok_nojura.pdfIn PDF document text
    • http://organic-ita.space/wogajuloru8m7e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5ff2c10dec89f.pdfIn PDF document text
    • http://sewonmedix.ru/guess_baby_food_game_directionshpac1.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/2a848e3fe.pdfIn PDF document text
    • http://daimontimur.org/online_text_document_to_jpg_converterbrrax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_6036cdcea0927.pdfIn PDF document text
    • https://vutavapurazamo.weebly.com/uploads/1/3/4/6/134643269/5283245.pdfIn PDF document text
    • https://devigafaviv.weebly.com/uploads/1/3/4/6/134698058/6062026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_6010aa9d2ca19.pdfIn PDF document text
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/2073939074d5.pdfIn PDF document text
    • http://yoganchik.space/rejalojekunuszt87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_600a233c68476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/mutapamemufinikajuxedulo.pdfIn PDF document text
    • http://mosokiwilag.rf.gd/42941701652.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/66764908915.pdfIn PDF document text
    • http://punegejofuj.epizy.com/24082241400.pdfIn PDF document text
    • http://jilutuve.rf.gd/58753697884.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/alembic_pharma_annual_report_2018.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_off0001638a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1638A 5140 bytes
SHA-256: 3b07c76f2343bdd98040065c9fc02e08dfe4857e2a7c4941ea5f04eea41fa18d
font_01_sfnt_off00017503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17503 12188 bytes
SHA-256: effe8ad1d8165a174cc4ca822e1723d7fe1e51909d61110f8b9dada41d750d75

Open this report in the interactive analyzer, or submit your own file for analysis.