Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dded0642c6ce21b…

MALICIOUS

PDF

75.0 KB Created: 2021-03-03 10:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5523b11120b03476933cee5677b2bfdf SHA-1: 93b093eb72413984d0d82628ce2780d2bc651521 SHA-256: 0dded0642c6ce21bc251a6ddf6398e9098c0ebaa0396e4f7bb9f99beae57a92d
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of external URLs and the nature of the heuristics suggest it may attempt to redirect users to malicious sites or download further payloads.

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://kuzutuzo.ru/wix?keyword=restrictive+and+nonrestrictive+adjective+clauses+quiz PDF link annotation
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/rijorapududorupojob.pdfIn PDF document text
    • https://jemaveroker.weebly.com/uploads/1/3/5/3/135391058/698073.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/hgfecjg/fake_girl_voice_call_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/B5Xdhix/my_cafe_restaurant_game_mod_apk_download.pdfIn PDF document text
    • http://ru-en.xyz/baazigar_audio_song_freeruudf.pdfIn PDF document text
    • https://kagamufoxigog.weebly.com/uploads/1/3/4/0/134013308/supolidububozozimof.pdfIn PDF document text
    • http://negozio50sconto.info/diablo_3_eternal_collection_ps4_review_metacriticm7aap.pdfIn PDF document text
    • http://fastgetme.online/divoperurawiboneferajomik0pug.pdfIn PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/ef5bc6112146e.pdfIn PDF document text
    • https://lemarowaverixax.weebly.com/uploads/1/3/4/3/134371099/10a22acab1cfac3.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/8021197.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/hdP3Qv2/49604553766.pdfIn PDF document text
    • https://nogalagamepet.weebly.com/uploads/1/3/0/7/130738620/1411391.pdfIn PDF document text
    • http://nigma24invest.online/831748613938yyjt.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/ejcjfhg/3670603181.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/forupokisip/traffic_racer_apk_hile.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/kuwatusekiliwekuvajajeni.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/online_marksheet_hsc.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/wiraga.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_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 5252 bytes
SHA-256: 957de8b2489f5ad829f4b2762fb2024684bf4e35babb3803853d06bc009b8c14
font_01_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 10040 bytes
SHA-256: a290f81f2ae4bb480ecd0bafac5f2b17e63f632b665a9eb41f65a2d588b6f6a0