Malicious PDF — malware analysis report

Static analysis result for SHA-256 05560b879b02742b…

MALICIOUS

PDF

74.1 KB Created: 2021-03-14 18:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 944751595e42a2443e98aff19661fcde SHA-1: 981c8309ed0bb6d5a28adb4c0d365a005d6bc12e SHA-256: 05560b879b02742beb1a7ef11fcb7e0566519042e21883a89ca72d144ae5418e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm behavior suggest an attempt to redirect users to malicious sites, potentially disguised as legitimate services like Canada Post.

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://dugedepap.ru/123?utm_term=canada+post+letter+addressing+guidelines
    • http://euroshopmn.space/how_it_works_aa_meetingu1jy1.pdf
    • http://zakosemej.mypressonline.com/dmarche_d_amlioration_continue.pdf
    • http://fakixigulidol.mywebcommunity.org/entry_mechanical_engineering_jobs_california.pdf
    • http://tamogulaganero.scienceontheweb.net/che_guevara_books_in_urdu.pdf
    • http://bupro.asia/77264125149tt2k.pdf
    • http://kernig.store/i_love_you_stinky_face_wordso7fur.pdf
    • https://wudegilunukoga.weebly.com/uploads/1/3/1/3/131379548/08ec15b9e3.pdf
    • https://dinuboxisoxim.weebly.com/uploads/1/3/1/8/131857966/973cdca727.pdf
    • http://fijubigatusurov.scienceontheweb.net/34653964691.pdf
    • http://gufutaca3.xyz/poweramp_crack_apk_freeemsle.pdf
    • https://zukudanasoxe.weebly.com/uploads/1/3/2/8/132815154/778ec4d671c.pdf
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/bd1c578.pdf
    • http://atomyimperial.ru/vesuxizevasiwh3gsm.pdf
    • http://wogivodugakovek.mygamesonline.org/polk_audio_6000_soundbar_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rewuwuja.onlinewebshop.net/how_much_does_nvivo_transcription_cost.pdf
    • https://uploads.strikinglycdn.com/files/72a07488-5bed-4638-8576-d72a7d38dec3/the_help_kathryn_stockett_summary.pdf
    • https://uploads.strikinglycdn.com/files/793d8ce4-c26b-45f8-8dff-21634cfc1f01/how_many_cases_of_covid_in_the_us_yesterday.pdf
    • http://fadezanunadafik.myartsonline.com/xoweburepumukagez.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5da.bin
3887e094ec5cf146bfd66bfd0e6c8f1d5f249b8343265be7290d8f9935e0bb35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 5032 bytes
font_01_sfnt_off0000f700.bin
a16bc953972ed2db4410ad4cb93cfdb1a6b153b5e50868d72c746cea55856943		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 10580 bytes

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