Malicious PDF — malware analysis report

Static analysis result for SHA-256 480ff96906bff5d8…

MALICIOUS

PDF

74.8 KB Created: 2021-02-25 08:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c1c91c5e6e6a7c02e78c6ca07efd99fb SHA-1: 7a60ab0e01fa2de679807f3674d65cbcba946bf2 SHA-256: 480ff96906bff5d8428ad701289694a5aff5f6e4b685248a989e0778bbc919ca
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, suggests a lure related to technical support, aiming to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/wb?keyword=how%20to%20reset%20epson%20xp%20600%20ink%20pad PDF link annotation
    • http://help-verifiedbadgecenter.com/rome_bus_linesdhu4v.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/2gigcL3/trackitt_n400_atlanta.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/lhbhigi/57993609070.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/5AaFghm/dulalow.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/bhakti_geet_music_free1n4p6.pdfIn PDF document text
    • https://lumuvimusu.weebly.com/uploads/1/3/4/7/134719948/4554300.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/jegehfM/las_vegas_free_slots_casino_games.pdfIn PDF document text
    • http://romeita.space/128034416807tduc.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/MIHjehd/transformers_earth_wars_cheats_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/kasunelebak/e1Gibjb/18099565565.pdfIn PDF document text
    • http://apparently-home.com/chinese_grammar_checkerm4gk1.pdfIn PDF document text
    • http://adv-workshop.site/enemy_gates_stealth_war_mod_apktbvf6.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/hggdijK/unnatural_selection_netflix_cast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://valupakukav.myartsonline.com/32936823384.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/27725416828.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_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 5404 bytes
SHA-256: 23614c72b296c1547bf1d95355d945bfff28087c5a1402f0a6e4a2b256daf347
font_01_sfnt_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000f8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 10852 bytes
SHA-256: 758389ca674bf9c9150572434abaec59e578e17d36fa350147a49a47c0d08f54

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