Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29f3878ae1d557f…

MALICIOUS

PDF

72.5 KB Created: 2021-02-25 08:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b64d749f726bf1bc50b7eb0b8e222545 SHA-1: 689e0125dfc17c8211480169dbd3f93533d9a290 SHA-256: d29f3878ae1d557fad55d0a4655ad38d496b823019716f4405912b5c0dfed1e3
126 Risk Score

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://druttle.ru/123?utm_term=samsung+rf4287hars+ice+dispenser+lever+not+working PDF link annotation
    • https://cdn.sqhk.co/xasurila/fKdavid/vudagawexoperupe.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/jc5Lhce/wells_fargo_mobile_app_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/hcMjeDh/forest_hd_wallpapers_1080p_download.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/56735708766.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/iaiaLgh/bobber_motorcycles_for_sale_houston_tx.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/tosevuvuxowawijew.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/fXUictg/8263741347.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/under_the_dome_season_3_episode_4.pdfIn PDF document text
    • http://mushygushysayings.com/71346505897evqhs.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/87891501235.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/sat_test_prep_courses_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/jDvjh4G/switch_plus_smart_home_controller.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/washington_state_phase_2_construction_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/zukeluzalepem.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_off0000d895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD895 6384 bytes
SHA-256: 6f0ab7533963463b812a44a5e23e30f2cbe81ab992e9feedc0052b560db62f15
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 10680 bytes
SHA-256: a0307798034d583250473a0910877b27b80ff817a460f279c370f2a6ea9f692f

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