Malicious PDF — malware analysis report

Static analysis result for SHA-256 fede0a73e248d429…

MALICIOUS

PDF

123.3 KB Created: 2021-03-08 04:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce33f7544222946f75d9b3fa9367c33 SHA-1: 2b157ddb382485de8f67132d8c535a63870f98b7 SHA-256: fede0a73e248d4290e5c56cdaf35730a08d2490830d23f98abbac9eeba33983b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm designed to host SEO-optimized content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=how+to+go+from+mol%252Fdm+3+to+g%252Fdm3
    • http://moxipafuxoxo.mygamesonline.org/how_do_i_use_my_nesco_pressure_cooker.pdf
    • http://theharaka.online/how_to_reset_clock_on_adt_premise_proh4sjw.pdf
    • http://tufodudem.mypressonline.com/how_does_a_hydrostatic_transmission_work_on_a_lawn_mower.pdf
    • http://worldhold.online/suxawufelikvhef.pdf
    • http://pubedetavilew.22web.org/xekuberu.pdf
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/jarolaninur.pdf
    • http://design-kvartira.info/blue-_bot_bluetooth_programmable_robot_class_pack2joas.pdf
    • http://hempmap.ru/defiant_motion_security_led_light_home_depoth8p4h.pdf
    • http://forajadafogaxuv.medianewsonline.com/what_can_i_get_my_boss_for_her_birthday.pdf
    • http://boketizabujig.scienceontheweb.net/best_build_for_dragonknight_eso.pdf
    • https://pizosamijuge.weebly.com/uploads/1/3/4/3/134348406/3834317.pdf
    • http://timecodes.net/404830804135hg61.pdf
    • http://magic-spring.com/52698204214y28s9.pdf
    • http://arboozfilm.com/reflexiones_de_parejas_en_crisisnjb1t.pdf
    • http://power-guard.shop/netgear_wndr3700_spec_sheet1u55p.pdf
    • http://kolagozisil.mywebcommunity.org/18864711550.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_3e49d2e2f8744946badeb56818526e1a.pdf?index=true
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_b59ca6c224054c06b9c4da50a7504f34.pdf?index=true
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_f2ed69360ec14716b4cb148b9ece89b8.pdf?index=true
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_a065f1279e474261acbfc5bd5cce2f1c.pdf?index=true
    • http://towilisok.epizy.com/double_negative_worksheet_1_brave_knights.pdf
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_c0aec31b8a464295aabf8b13294aa86a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a67d.bin
d280a22f1742ce4c3ca86fd9ea76d1c49b927ac4afdf142ef2023a052451add1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A67D 5092 bytes
font_01_sfnt_off0001b7e2.bin
14c088c4d93ae324c382d9a9f533c5143f61b4fb6188f7d5be35a9411f453438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7E2 11624 bytes

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