Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd76c383ae647da…

MALICIOUS

PDF

74.0 KB Created: 2021-02-28 17:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fa52cf98375ef3a71a6320a96c9d2889 SHA-1: d4ad03adec47b397bc909ebb381a7e4e6a6ca7a1 SHA-256: 9dd76c383ae647da4692941c4b6fd8f2db97e6f1486fa7588720362632cc2947
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains, suggests a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights the nature of these links, aiming to obscure the true destination.

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=2015+malibu+led+lights PDF link annotation
    • http://paselon.getenjoyment.net/c_primer_plus_reddit.pdfIn PDF document text
    • https://nimijakis.weebly.com/uploads/1/3/4/5/134577625/a3998e8ff7a.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/bodunufoguliv.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/hghb4UO/lejukasonarobe.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/figukelanajod.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/36721990039.pdfIn PDF document text
    • http://dikiwezuvejeve.iblogger.org/c_template_member_function_pointer.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/personal_finance_crossword_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/hOjjheU/gukekegabitotirowilig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidovikuvam.epizy.com/cnc_simulator_apk.pdfIn PDF document text
    • http://lobaman.epizy.com/50210324717.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/rebebiziratezobazikonile.pdfIn PDF document text
    • http://gawowupakifofe.rf.gd/the_adventures_of_sherlock_holmes_illustrated.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/38764029621.pdfIn PDF document text
    • http://podapuleleg.epizy.com/accidents_reported_today_york_pa.pdfIn PDF document text
    • http://fuvimexapa.rf.gd/copper_mountain_ski_resort_snow_report.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE347 5636 bytes
SHA-256: 83c0cb87e09e0725123c92b0d88d54a7e61f79f3c7462482304f447a7545b87f
font_01_sfnt_off0000f64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 11084 bytes
SHA-256: 85731e42e38797e7e5af2cd046afdfad2fbf625a1f416d0ede37d784e5bdd2b5

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