Malicious PDF — malware analysis report

Static analysis result for SHA-256 801aaf874c9d8ee6…

MALICIOUS

PDF

80.1 KB Created: 2021-03-16 18:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 31a8d7af65a8a19ccca3c284133693af SHA-1: 5a89540296b04213ac28561e1e4a49360397d137 SHA-256: 801aaf874c9d8ee6b03287834307e5fbfd3be6aa314150a3dad4614701d04f3a
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=husqvarna+6021p+owner%2527s+manual PDF link annotation
    • https://cdn.sqhk.co/bidekidarub/FsbijEH/mad_battle_royale_mod_apk_2020.pdfIn PDF document text
    • http://mazanatur.space/next_upcoming_android_version_namenqud6.pdfIn PDF document text
    • http://olymp-trade.top/baloxugasujapekobustcvn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_600e37156c1cf.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/igiahnJ/87523173991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489257/normal_6003c07006955.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/18136889876.pdfIn PDF document text
    • http://okrasote.info/diary_of_wimpy_kid_long_haul_full_movie_onlinevsxhg.pdfIn PDF document text
    • https://zabutamudosuwox.weebly.com/uploads/1/3/5/3/135345211/64703.pdfIn PDF document text
    • http://cmb-eco.com/wevetadubugoronelalejaxout7c.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/2021_toyota_camry_xse_for_sale_near_me.pdfIn PDF document text
    • http://zovolexune.sportsontheweb.net/winds_of_winter_sample_chapter_barristan.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/8556975338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_601e502348065.pdfIn PDF document text
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/6187755.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/9627541.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/ibjf0ih/91756792833.pdfIn PDF document text
    • http://erethiztzj.space/nebubeoopju.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
    • http://velelakolifuvu.onlinewebshop.net/gefizazolopevobopewubila.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 5472 bytes
SHA-256: dadcc538c1d01cd09689a9da79378ce3531fcabf5a0d005d4c2c2b5f7f7dd13a
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 10412 bytes
SHA-256: 34bc5f1de31bf8ec5d4135f62f45a9f515cf23b7be1df9e6434164153250f9fb
font_02_sfnt_off0001238f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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