Malicious PDF — malware analysis report

Static analysis result for SHA-256 752b9a5309688b45…

MALICIOUS

PDF

80.7 KB Created: 2021-04-10 11:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 25073e9128b7cd4f66161ad00699b139 SHA-1: b00e04875a04d1cde4274a3e87af7e09fd26e9a7 SHA-256: 752b9a5309688b458d16b2661ac66c6e701923ff469af1fa19fc5af3386e2fe2
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 0.9996

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://dafemum.ru/strik?utm_term=nespresso+aeroccino+3+user+manual PDF link annotation
    • https://cdn.sqhk.co/xaripisi/khgjctO/truck_racing_games_online.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/jewish_encyclopedia_free_download.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/dupematugejowabiweripo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6052fe440e3c5.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/adagio_for_strings_organ.pdfIn PDF document text
    • http://fogejebimo.scienceontheweb.net/alternance_codique_definition.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/panduan_belajar_bahasa_inggris.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_6026ea38e4e63.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/fujomiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_604390cd637c6.pdfIn PDF document text
    • https://cdn.sqhk.co/xazewizol/uJ3Sgia/wunizarenamigosudele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_604010d13ce29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446651/normal_5ffa608be8be3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_8cd6e7428b6f4c968621cf74203b6540.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_c5467a59e2944c068a4a7a6fbf382e17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/53080456225.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/kaiapoi_weather_reports.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_bac2b3881d084da2b9e86734742ac487.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadobirak/75077986953.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_96108a0fbe0b456fbbc6f48e8e12f969.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/94400054808.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_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 5212 bytes
SHA-256: 679ce776b297a4177935d0322a39389c91e27d087e36860c0816198c048b01fa
font_01_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 11172 bytes
SHA-256: 80191b7a8dba73f701cecef6e771fb3a6f8b8edf09e94b8ffee9caacb9eec57b

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