Malicious PDF — malware analysis report

Static analysis result for SHA-256 1029ad72dc9a82dc…

MALICIOUS

PDF

90.7 KB Created: 2021-02-20 20:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b5f992dc7e26283bcfbe6c37e0192f43 SHA-1: e3de5a423758d985bb7e25941f838413b029cc6a SHA-256: 1029ad72dc9a82dc6c7eb95b75f923db3943b0dba139ecb02b3f6923460e5363
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including random and disposable link farms pointing to external URLs. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to 'Diablo 2 amazon skills guide', which is likely a lure to entice users to click on the embedded malicious 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/wix?keyword=diablo+2+amazon+skills+guide PDF link annotation
    • https://cdn.sqhk.co/febowozefu/RgRYid9/hockey_goalie_mask_painting.pdfIn PDF document text
    • http://mosquito.codes/61148867169bf8aj.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/CiUjfgg/human_resource_management_salary_with_masters_degree.pdfIn PDF document text
    • http://guitar.su/aaa_logo_maker_crack_free5t8g5.pdfIn PDF document text
    • http://dvigatel.guru/buxukunobojibubowanejixetamsmg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419193/normal_5ffaceab3c40b.pdfIn PDF document text
    • http://fusavexupisedi.iblogger.org/tupejudipexawisewuzikaki.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/dgdJhdP/54170886837.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/jciji8U/zombs_royale_permanent.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/gibgoOh/pic_puzzle_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/gfUygjP/fake_gps_location_spoofer_joystick_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pakiwujipubi/0idjchi/10068152880.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/hb7hfij/best_k-_pop_music_videos_of_2019.pdfIn PDF document text
    • http://pogadai.xyz/tupperware_rice_cooker_microwave_instructionsyvwep.pdfIn PDF document text
    • https://cdn.sqhk.co/mixekuwuvo/ZmrejiR/download_beat_racer_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/hdjgZgh/76157115960.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wosotufozutula.epizy.com/macbeth_study_guide_act_1_scene_4.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_off0001273e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273E 5436 bytes
SHA-256: 4e0c06a5001e0846bdb011056656f3e8d886a6a7822951b30bde01af7d7b3753
font_01_sfnt_off000139b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B8 10504 bytes
SHA-256: df73d1ba9e0d74158586c9b880cbdf976445559a5cef5c68ed1ef09a8db044f5

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