Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65091743bfece62…

MALICIOUS

PDF

64.3 KB Created: 2021-03-24 20:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f40e4074ad399df2d13b017971775452 SHA-1: 332015df11552745c18f686e82d214a822ac0f9b SHA-256: d65091743bfece62cbf3a90fa173d9b2622b3a9f747381b9d4a9dac64127395e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to 'frp bypass apk', suggesting a lure for users seeking such tools.

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://gimoguvi.ru/123?utm_term=easy+frp+bypass+apk
    • https://cdn.sqhk.co/wekaradukuve/fhgjgDq/short_girl_chat_up_lines.pdf
    • https://cdn.sqhk.co/xadelakora/fjghh3Y/xazuminalemureb.pdf
    • http://valuburikodajad.medianewsonline.com/how_to_treat_periodontal_gum_disease_at_home.pdf
    • https://ferovagadimi.weebly.com/uploads/1/3/2/6/132696304/totawejeru.pdf
    • https://zoradelageruwol.weebly.com/uploads/1/3/4/5/134591251/a18cf0.pdf
    • http://medicalpracticementor.com/13162328231oqvgq.pdf
    • http://cmbespaceclient.xyz/tecnicas_recoleccion_de_datos_estadisticosf8rqk.pdf
    • http://wotidoteked.mywebcommunity.org/philips_cl034_universal_remote_control_codes.pdf
    • https://cdn.sqhk.co/zedawuzijis/15dmgpw/tower_defense_thing_td_game_mod_apk.pdf
    • https://xijiweba.weebly.com/uploads/1/3/5/3/135387982/1626409.pdf
    • http://futigovu.scienceontheweb.net/key_concepts_in_critical_social_theory.pdf
    • https://cdn.sqhk.co/puxezuxivas/izZljdM/73082949666.pdf
    • https://sizadomuwegemos.weebly.com/uploads/1/3/5/3/135335556/zisinug_xukedoz_kedete.pdf
    • https://cdn.sqhk.co/manuguwe/jjgjfY1/ludo_online_dice_king_mod_apk.pdf
    • http://aov.one/cisco_asa_5505_iosi23uz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kagijido.myartsonline.com/where_to_donate_toys_near_me.pdf
    • http://tiruweditivunaw.myartsonline.com/motorola_mc9090_stuck_on_boot_screen.pdf
    • https://s3.amazonaws.com/nosepevozux/19693938125.pdf
    • https://s3.amazonaws.com/wivunonovef/viviwanisuxara.pdf
    • 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_off0000c165.bin
2680a2bb1d2921081c449a5c703c7049fdc8e42b592f6e0fc7765ef29eacd211		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC165 5128 bytes
font_01_sfnt_off0000d2f0.bin
990e2f5d291c5db1a7da85276e6523405221f5edcdb942be6ea7e605d7ac260d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F0 9832 bytes

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