Malicious PDF — malware analysis report

Static analysis result for SHA-256 555c880e9ada6f4a…

MALICIOUS

PDF

77.6 KB Created: 2021-03-26 12:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f3ad974d002968dd24938ee8b0416759 SHA-1: d6258e259fc9379b9abf7c45dc8bd729f7147d15 SHA-256: 555c880e9ada6f4af08387050c0cfa7d87eadbcf044235e113305224d92f2ac7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external URIs, with one specifically referencing 'cyberpunk 2077 release time usa', suggesting a lure to disguise malicious links. The PDF also functions as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of external links and the overall structure point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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=cyberpunk+2077+release+time+usa PDF link annotation
    • https://cdn.sqhk.co/sagitusat/jhbjbH6/62782596967.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/Csagd4d/offroad_car_driving_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/jigdcin/sure_shot_lyrics_yellowcard.pdfIn PDF document text
    • http://grampus-shop.com/julijawaxeli0ux9.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/ja7jh3D/nanobikibapagotowerofasad.pdfIn PDF document text
    • http://plafond.xyz/can_i_claim_ssp_during_self-isolation1x432.pdfIn PDF document text
    • http://tk-pobeda.site/lesson_12_divide_whole_numbers_answer_keyx6fga.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/whf4ja0/76268251488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_60192c1853800.pdfIn PDF document text
    • https://cdn.sqhk.co/zaborofisi/cZf0hid/bricks_breaker_plus_hileleri.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/who_is_the_scary_girl_in_fifty_shades_darkerzrgro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471085/normal_600f44082e4e6.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/ojaYifz/gobifedodedazate.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/i61W0gj/zombieland_2_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/ifFNhiA/57682603877.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/o8ocWUo/process_improvement_template_ppt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411926/normal_60092704a3475.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/legesiliv/stock_market_open_tomorrow_july_3_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/11212872775.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_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 5528 bytes
SHA-256: 347a2294f11a20d46192151c1a13539aba9d480f135d96b31798ab0f42a20af0
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 11904 bytes
SHA-256: 43bf9f26eff563de80444926840ddd0b003c4bf7f46355d55b5997fea6a957e3

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