Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe95e06f71015c4…

MALICIOUS

PDF

76.6 KB Created: 2021-04-14 14:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: edbe4afaa71dcb3c05d384d829ae6fa4 SHA-1: 383f73c719c966cec9c52e6d9fbeea040f2cc3d3 SHA-256: 7fe95e06f71015c4a6f09c95b811296e0b9377a7804dd17b500581731da95004
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 0.9997

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://soxebez.ru/strik?utm_term=warhammer+fantasy+human+factions PDF link annotation
    • https://cdn.sqhk.co/kakapoxavu/eI2gdxt/87412835499.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/jdghSie/redbox_on_demand.pdfIn PDF document text
    • https://cdn.sqhk.co/dudurejavir/pf3HZSV/88864024093.pdfIn PDF document text
    • http://dugipoxumiku.iblogger.org/sharp_el-1801v_set_date_and_time.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/hijLJgj/zombie_strike_online_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489441/normal_6012bf0df30ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_601508dc8b834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426271/normal_5fe29acf0ea08.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/8Yjjgi1/best_qr_scanner_android_app.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8hciajf/the_walking_dead_movie_1995_cast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_5fd0dfa7557cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_602fab838601d.pdfIn PDF document text
    • http://momijuluxesapek.iblogger.org/79869316176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_60461b75c3bcb.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/ibuqKhc/65573542543.pdfIn PDF document text
    • https://cdn.sqhk.co/duburijudi/hlgd3je/jufip.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/csNWIoT/arcadia_sliding_door_repair.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ferurexage.epizy.com/95348196775.pdfIn PDF document text
    • http://bunokulenixa.epizy.com/gajojidukofutow.pdfIn PDF document text
    • http://zufavikog.epizy.com/the_science_of_near_death_experiences.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 5204 bytes
SHA-256: 4e0755b3158905537595a7f4fdd41b21124ca9d93846c5b18ee54365e677ad0f
font_01_sfnt_off000101b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 10376 bytes
SHA-256: d177e5eed5e2f3c8653970278024e8e7f819ad62e4c54076c427105fe009384f