Malicious PDF — malware analysis report

Static analysis result for SHA-256 60db9ee92f30242d…

MALICIOUS

PDF

70.9 KB Created: 2021-02-17 03:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6a5cbb71978ac6e295c9db187cb0f77e SHA-1: dd61644614554b4d7c666727f8b34273207562c1 SHA-256: 60db9ee92f30242da1599abe502b350c0b1344f69dd5d9f235658c9b1da6e240
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a link farm, with many pointing to disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or SEO spam purposes. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=how+to+use+divider+in+dog+crate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366018/normal_6016d81c1f684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5fe792b07b049.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/6aLAgh6/photo_warp_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/Chhijfe/ninja_foodi_air_fryer_pressure_cooker_reviews.pdfIn PDF document text
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/niraxinatojefiw.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/EHBWjil/hola_music_mic_stand.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/gijuigF/29781085054.pdfIn PDF document text
    • http://fozakewugumomig.22web.org/how_to_activate_timex_indiglo.pdfIn PDF document text
    • https://waxujonugo.weebly.com/uploads/1/3/1/8/131871493/fifuko.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/bij7oey/snes9x_ex_1._5._37_apk.pdfIn PDF document text
    • http://dulomagukide.22web.org/sisolasowi.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/IiigZgh/poker_game_offline_apk_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456121/normal_5fc963db6899e.pdfIn PDF document text
    • https://cdn.sqhk.co/zumiredosuwi/Fjcwrgh/tiktok_creator_fund_no_views.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://navasegekukuj.epizy.com/anisocoria_en_gatos.pdfIn PDF document text
    • http://zidegegizuvodin.epizy.com/1307696624.pdfIn PDF document text
    • http://ketufazez.rf.gd/nesanifoluwimusebo.pdfIn PDF document text
    • http://bunulewokiluko.epizy.com/adhe_kangal_movie_video_songs.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_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 5188 bytes
SHA-256: 164d80ee204fa9fc1e25f3f3cebc7a6a3e0597260db95453cab931fbe3a3bc44
font_01_sfnt_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 10492 bytes
SHA-256: 04d198f79631eff3b38178e273cb4d17728f60785b3164046541e187d22c3cec

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