Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb959a7e650b06d…

MALICIOUS

PDF

81.5 KB Created: 2021-04-02 19:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 104a36f1a60883223b5b30b39b07e100 SHA-1: d6b6ef955f5844df230140c062f01c283ec8bd24 SHA-256: 3cb959a7e650b06db1596b11c80392a2135159c6f341f1a07c234412bd10ec10
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to disposable domains and are likely part of a link farm designed to deceive users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan activity. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=safe+site+to+download+apk+reddit PDF link annotation
    • http://pesale.pro/36103285937kw2ij.pdfIn PDF document text
    • http://reduslimitalia-official.site/7mm_mag_load_data_imr_43505v0pq.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/ncert_solutions_for_class_11_physics_chapter_2_-_free_download.pdfIn PDF document text
    • http://avit0.pro/gafevokotumikidf1ct.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/carthage_empire.pdfIn PDF document text
    • http://chaptejvxz.fun/498222826318zsv6.pdfIn PDF document text
    • http://belkwigs.com/is_monster_an_adjective2umsv.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/asus_ac1900_rt-ac68u_wireless_router.pdfIn PDF document text
    • http://mivetys.xyz/12491680560cfe7u.pdfIn PDF document text
    • http://potenciy.xyz/plantronics_headset_m70_pairingnxkoh.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/lave_linge_bosch_maxx_5_performance_1200.pdfIn PDF document text
    • http://luwakixifotizim.iblogger.org/seda_alessandro_baricco_portugues.pdfIn PDF document text
    • http://arenda-comp.space/popofonazaratif9w7.pdfIn PDF document text
    • http://hallhq.xyz/53971418990d1khu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_2698f0d72ece438b8272adbecfac3b2b.pdf?index=trueIn PDF document text
    • https://736f3f86-ac4a-4d06-be6b-3320275ea8ee.filesusr.com/ugd/cd27d0_2b4d21355e7a4ea898f5cd68c7ebc46f.pdf?index=trueIn PDF document text
    • http://kugilib.rf.gd/how_to_program_verizon_fios_remote_to_samsung_smart_tv.pdfIn PDF document text
    • http://bonogeliraxi.rf.gd/levepesegipuduxuriterom.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_86a58be745bc4cfcaab28f0d761919fc.pdf?index=trueIn PDF document text
    • http://nifibomagogov.rf.gd/88672661038.pdfIn PDF document text
    • http://pujumek.myartsonline.com/divemog.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 6

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_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 5292 bytes
SHA-256: 05631551e7be6ccd95f0f71971c9f8033948b88d63c87aa05b057b9528c36379
font_01_sfnt_off00011394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11394 10944 bytes
SHA-256: 518bab50a36175735941ab06028346b2625e863e0bcc19de8101baf69608e60e

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