Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9e1061082882ad…

MALICIOUS

PDF

82.3 KB Created: 2021-01-22 02:55:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d2edf2a50883f74983912700af7fc6b1 SHA-1: 1f92f018aa2fcec927dbe8400dc9897a169c6976 SHA-256: ff9e1061082882ad548f22267fc2f0d73b4cae8da233184be08e9cc17d529d96
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or SEO spamming campaign. The embedded URLs point to various domains, some of which are hosted on dynamic DNS services, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://trafftec.ru/wb?keyword=block%20story%20mati%20soup%20recipe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465719/normal_5fdbfe7711e1d.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/fPAjdic/ready_made_projects_in_chandigarh.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/gg4hihc/colony_brands_home_agent_pay.pdfIn PDF document text
    • https://cdn.sqhk.co/didowaba/iaHhbie/jejeviriwubaxekadokam.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/hbjehc4/cinemark_theater_city_center_newport_news_va.pdfIn PDF document text
    • https://wumetitazidizo.weebly.com/uploads/1/3/4/8/134885052/ferumevuvekili.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/nixelajomodizit.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/brhbhb4/jevagomogej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_5fd15ae074686.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/Njhgfib/zavesukonixatiporalez.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/j4s3Age/dr._web_security_space_pro_serial_key_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_5fd9f7d6ce00d.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/dcagdM3/water_boat_racing_apk.pdfIn PDF document text
    • https://kimexigute.weebly.com/uploads/1/3/4/0/134017587/kigami-vifut-lumatadeval-pedoxogi.pdfIn PDF document text
    • https://nupuwuzom.weebly.com/uploads/1/3/1/4/131438231/635808.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/ZegjdfR/pounds_to_kg_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/PDwgePr/snapseed_for_mac_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/Snja7jf/temple_run_2_cool_math_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 5292 bytes
SHA-256: dc509fcfd9b76427f32e9a7b69c14a934be84942a03c6c5afcac668274ebfc07
font_01_sfnt_off0000f787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF787 1964 bytes
SHA-256: 3974e200c5d9c8f30123e1eac38fa50876741fee3be316e840f85b529713d3bf
font_02_sfnt_off00010093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 10304 bytes
SHA-256: b8294b5f18a5ddc6120c447d512f5ed19a098a08e726f8754cbc37192ba44f74
font_03_sfnt_off000123e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E3 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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