Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c9a9f683c95d6e…

MALICIOUS

PDF

74.6 KB Created: 2021-02-15 17:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 800935edf3405b0392ed3a80c66c66bf SHA-1: 3e762b3c21a5f5e14d12d0e6b2744e6d0832b566 SHA-256: 75c9a9f683c95d6e81d0f73b4d91bacf17c2cb093326c1fd455b44c8593f1a14
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics as malicious, including a phishing and trojan detection. The document body, though heavily obfuscated, appears to be a lure related to search queries, directing users to a suspicious domain. The presence of numerous external URIs and the ML classifier output strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bologen.ru/strik?utm_term=how+do+i+get+a+satellite+view+on+google+maps PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5fdedc6b72ca1.pdfIn PDF document text
    • http://tegor.xyz/tadegaxobabapapipimevobdo0.pdfIn PDF document text
    • http://daating19.site/25431518200tr1ic.pdfIn PDF document text
    • http://nejamaranidirit.22web.org/50331040544.pdfIn PDF document text
    • http://beautysss.site/belewibidibad76pqg.pdfIn PDF document text
    • http://kawolamekepe.22web.org/hospitality_staff_training_plan_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407818/normal_5fcd1620bed76.pdfIn PDF document text
    • http://onlinetiser.website/wipeout_3_nintendo_3dsorx27.pdfIn PDF document text
    • http://jizefuli.22web.org/57059788236.pdfIn PDF document text
    • http://sungo1.space/music_and_arts_hours_sundays2vv8.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/baxekojojexusol/6844726904.pdfIn PDF document text
    • http://wanudoxemix.epizy.com/carte_du_monde_deco_grand_format.pdfIn PDF document text
    • http://jatomije.rf.gd/zelajoxuvegexoliforopefab.pdfIn PDF document text
    • http://lejaxofin.epizy.com/46559261177.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/beckman_coulter_access_2_operator_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/messenger_lite_mod_dark_apk.pdfIn PDF document text
    • http://losalevova.epizy.com/boy_scout_popcorn_sales_form.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_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 5296 bytes
SHA-256: 6c629b1fd0cff5f9f0333def89b46daab0ce11deacf8b2aa16ce6eb5a7c6a66f
font_01_sfnt_off0000f7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 10972 bytes
SHA-256: 9ce57a4aecb78aed32e75c28c484e93c918edeb434723d42b0ea1a417cacf055

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