Malicious PDF — malware analysis report

Static analysis result for SHA-256 02306ba57935fe48…

MALICIOUS

PDF

85.3 KB Created: 2021-02-24 06:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 73d695647327a47641a7374c2e28a0d0 SHA-1: 35b45a45ecfa812072d1763e54087804193359f5 SHA-256: 02306ba57935fe4855938bb0739a0f92e7cd1c47bd78f944aca814b3591484a2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of external URIs and the nature of the link farm heuristic suggest potential for JavaScript execution or redirection to malicious sites, aligning with T1059.007 and T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=g+shock+ga+100l PDF link annotation
    • https://kuxubujokug.weebly.com/uploads/1/3/0/7/130775750/topuraxu.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/hhbSNjb/93638820729.pdfIn PDF document text
    • https://nopifabuda.weebly.com/uploads/1/3/4/6/134693299/kazomita.pdfIn PDF document text
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/3684853.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/g4N38GM/real_madrid_wallpapers_4k_2020.pdfIn PDF document text
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/1685f3aae02ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_601ee6ac3e3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_60307ca71bc4d.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/fdb55135f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_6017a5d8c3064.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/chdjbCZ/25044904366.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/pibajuwi/watezifesekamixadevaf.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/43468482208.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/33750690179.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/15523195597.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/34347443785.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/oracle_api_platform_cloud_service_apiary.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/wuwer.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/composite_function_word_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/damodaran_committee_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/adventure_time_season_8_episode_24.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/wow_cataclysm_leatherworking_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/3286249420.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/gmail_app_dark_theme_android_9.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_off000113a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A7 5252 bytes
SHA-256: 3ebe756aeac9374895cbdfe54d835eaeeeaf22dc031949b0ebd1df343d79f2af
font_01_sfnt_off00012591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12591 9940 bytes
SHA-256: 6ac9c1049fdab7d070f948bce02464e375082661f9d254a80924ceac58022243

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