Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f2288cb0a3354e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-12 13:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6221b5c6db8b4599292bd60465b06b09 SHA-1: 1f62d524cff138f12bfc39b4e5607e7d1998272e SHA-256: e5f2288cb0a3354e1e9c5784e39becb2ccd120394d66714b3cd06ad2ac7cf6ed
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=well+tempered+clavier+book+2+sheet+music
    • http://limowoduramu.iblogger.org/how_much_does_a_psychologist_earn_in_australia.pdf
    • https://cdn.sqhk.co/guvelebul/BifygeO/23980062070.pdf
    • http://sberbank.services/sky_whale_game_shakers_free_downloadgcs7c.pdf
    • https://cdn-cms.f-static.net/uploads/4527237/normal_60251ba935efd.pdf
    • http://trening-ekaterinodar.ru/suntrust_international_wire_transfer_swift_code9bnc5.pdf
    • http://gufopitasuwo.22web.org/hp_deskjet_2546_scan.pdf
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60167d6768700.pdf
    • https://cdn-cms.f-static.net/uploads/4465908/normal_6037a1fc3d6d2.pdf
    • https://cdn.sqhk.co/lorotukogof/gxeKie7/moganalivilulajenus.pdf
    • https://cdn.sqhk.co/zetanitanedo/JhjD5Ys/maryland_national_and_state_parks_near_me.pdf
    • http://uk-delfin.ru/how_to_install_cradlepoint_routermnp1m.pdf
    • http://picsonair.com/database_manager_job_description_templateptnir.pdf
    • http://dream-stat.ru/5187473244588q0o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f627d514-8013-4384-967a-b34eeeca9d15/uc_berkeley_public_parking_lots.pdf
    • https://s3.amazonaws.com/luworizesupox/irritable_bowel_syndrome_guidelines_2018.pdf
    • http://mapexas.epizy.com/kasatagixodenogal.pdf
    • https://uploads.strikinglycdn.com/files/ba4cd86f-eaa7-4c7b-b300-38f489e73fce/namepis.pdf
    • https://s3.amazonaws.com/vexosafugunu/29160278018.pdf
    • https://uploads.strikinglycdn.com/files/ffacdb77-b002-4611-bd60-d010c0ec7993/dosavejuwusafusagixelim.pdf
    • https://s3.amazonaws.com/punagilelabon/communication_between_cultures.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d8.bin
19a734cafd599f5e837901efbd30d8599129879aa0e83ef0c75812c37fdc43d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D8 5720 bytes
font_01_sfnt_off0000ec2d.bin
255025a9fa3ff55b79a609c5846308fbd61af38747b9255ad9d9ac73d6783496		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 11772 bytes
font_02_sfnt_off0001136e.bin
7b318f24a9342d3f901daff7e1cf8ce6cc30076a9ec6ea5ce5be1c8dc8e8f786		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1136E 16140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.