Malicious PDF — malware analysis report

Static analysis result for SHA-256 743c411560fc224a…

MALICIOUS

PDF

75.8 KB Created: 2021-05-11 14:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b4f798c2471af735c75ae0318b29828 SHA-1: dcdab1f8c948116d74c7b2288d51cb051e56f455 SHA-256: 743c411560fc224a7d82816fab05abab4baf669f36a4c5373338821470c33310
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://zajinet.ru/strik?utm_term=craftsman+yt+3000+lawn+tractor+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496170/normal_5fffea02b384e.pdfIn PDF document text
    • http://presentinsta.site/87580858861fiau3.pdfIn PDF document text
    • http://fesagumobelute.iblogger.org/60679122564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444644/normal_5fca6c01cc39a.pdfIn PDF document text
    • http://delinapod.mypressonline.com/81988499749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_6058b35c764a8.pdfIn PDF document text
    • http://clientbluebadge.com/sword_art_online_fatal_bullet_multiplayer_german7l5sg.pdfIn PDF document text
    • http://criticcxck.space/fuzatewusesarigilodapeze1usw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465003/normal_60228bafa3b6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417033/normal_5fddd9517409f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_6063650465a54.pdfIn PDF document text
    • http://waralolojogeta.sportsontheweb.net/wedding_march_organ.pdfIn PDF document text
    • http://dayzcommunity.info/resource_optimization_techniqueshe2ft.pdfIn PDF document text
    • http://avlto.best/download_film_after_we_collided_2020_sub_indo_full_movieiibyx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_603f19fc605cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_6066ae3aa2535.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/zufaxepixiguxax/zibozabamolunifisul.pdfIn PDF document text
    • http://tititogejeda.rf.gd/.pdfIn PDF document text
    • http://velefejaforafe.rf.gd/bloody_roar_3_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/difference_between_organic_and_inorganic_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/78029990882.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 5432 bytes
SHA-256: 4b2faceffca375223a644d57247aa6fae1fc63b9551da22e2d271f852bd0ff24
font_01_sfnt_off0000f6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B8 12756 bytes
SHA-256: a2a011bdd036ea101d4c864018939f4374a79e4edf87861f02390d695e9a31ab

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