Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bdca23e330d5d5…

MALICIOUS

PDF

69.3 KB Created: 2021-02-28 11:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e428d3633a5845d7e3caadf2c841c02f SHA-1: 205fea76ad06d01ad5d90041e34f92fd6d4fcc66 SHA-256: a6bdca23e330d5d534af8015923a77f568ecbc7ff472c2e864cb625bbe43d6d1
186 Risk Score

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://resalured.ru/award?keyword=how+to+take+graco+swing+apart PDF link annotation
    • https://cdn.sqhk.co/ravusigi/ijWjgva/84671417777.pdfIn PDF document text
    • https://fuwelajefupeze.weebly.com/uploads/1/3/5/3/135390198/wosomuz.pdfIn PDF document text
    • http://rabota-plus.club/58937801402v3mm8.pdfIn PDF document text
    • http://eglo.club/what_is_the_only_known_wingless_birdx9b19.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/cdf1ec27423f1.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/ai0jhjj/monkey_rolling_eyes_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/cjdghhd/ludo_king_play_online_on_pc_with_friends.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5ffd281a05676.pdfIn PDF document text
    • https://rikodobuged.weebly.com/uploads/1/3/1/6/131606346/db73bfa6c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5ffe6e22eea8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_602ba80e6feed.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/esOpVby/frontiers_of_space_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/gfC4jfH/learn_to_speak_latin_american_spanish_free.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/38fab24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://simipibenafar.epizy.com/xaguretatu.pdfIn PDF document text
    • http://soxuxemakim.rf.gd/4365795246.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_off0000c8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A9 5188 bytes
SHA-256: 9b12d619175237fa7c6f99cf1554dd49cfbc1ab7cbfbc7931d3186508f8ee666
font_01_sfnt_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 14024 bytes
SHA-256: 3a1a53e22b80c55acbbddffc4a676091df55329dcdf21758f2cb4c660a71dcc0