Malicious PDF — malware analysis report

Static analysis result for SHA-256 85815c7f64f4072d…

MALICIOUS

PDF

80.7 KB Created: 2021-03-29 06:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0d3e9d209c6d46308794a021b15b90b6 SHA-1: 58f4926e1ec21b1761c205e6601155bf0ae0a254 SHA-256: 85815c7f64f4072d6f900e71edcff08b6ac8a35df14a534681d271b961182c7d
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 0.9998

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://dugedepap.ru/strik?utm_term=does+two+can+keep+a+secret+have+a+sequel PDF link annotation
    • http://likelid.xyz/25712744781uwrpq.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/JN8jeTW/jogobujezege.pdfIn PDF document text
    • http://apkweb.net/5677466089rp9bp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457281/normal_60571267eb6f8.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/QZ4je2Z/real_time_shields_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_60538919b6fe3.pdfIn PDF document text
    • http://nickned.me/govejuzawukanons6idl.pdfIn PDF document text
    • https://cdn.sqhk.co/vopiruwikil/8Ixbdjj/wevis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/satuja/how_to_make_money_in_stocks_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/best_management_books_to_read.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/indonesia_travel_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/xotewosesori.pdfIn PDF document text
    • http://dabixuri.rf.gd/twenty_thousand_leagues_under_the_sea_summary.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_ea9b2ccbb3be4d619be4f39b8ae39526.pdf?index=trueIn PDF document text
    • http://kinikodiraxo.rf.gd/4935613466.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_3cf565118163444fb37ce89002af20b7.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 5196 bytes
SHA-256: 0d15cce02524cd1634e4cd29b6a24b638353f0925bf3e2ea63031a6fb209aff0
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 10936 bytes
SHA-256: 3ef743e521e89ee49043306846615492a8dd192d0203043e4e1a50372eb91d4f
font_02_sfnt_off000127d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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