Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bac6f01698c377c…

MALICIOUS

PDF

70.6 KB Created: 2021-03-31 20:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e60ae98e310e6c82b5161304822d75d4 SHA-1: b2b25a668de6d0c6267cbe30b3c12a1d43a26a51 SHA-256: 9bac6f01698c377c0716830fc2d684366a4f2ea9d582289d869a7a7f796e48bb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious or phishing-related content. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or distribute malware. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports the malicious nature of the file. No scripts were extracted, but the document body and heuristics point towards a link-farming or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=the+century+shell+shock+video+questions+answers
    • https://kotedakivon.weebly.com/uploads/1/3/1/6/131637811/695f99.pdf
    • http://uuuuull.space/galefowedimoxoguwaizlv3.pdf
    • http://sallely.xyz/calligraphy_writing_fonts_freezjm68.pdf
    • http://jesofoma.getenjoyment.net/adobe_acrobat_pro_editor_free_download_full_version.pdf
    • http://nusowutevu.getenjoyment.net/hayward_ecostar_drive_error_pump_stalled.pdf
    • https://tesevazaxuj.weebly.com/uploads/1/3/4/4/134476418/7108004.pdf
    • http://moxilekulina.getenjoyment.net/how_to_read_the_air_book_review.pdf
    • https://kemosufasegu.weebly.com/uploads/1/3/4/3/134348140/kukutuxagan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_5fdb8e46c7d8464091d5b82033c487f2.pdf?index=true
    • http://mosidexetika.epizy.com/sutad.pdf
    • http://tizavoju.rf.gd/92470435599.pdf
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_6a2baa22683a4dcf968f4911ea0fa222.pdf?index=true
    • https://s3.amazonaws.com/xirixepo/leadership_gap_analysis_template.pdf
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_547b88f8a1fc446f9b4f141ac8001cb5.pdf?index=true
    • http://goputiwizixax.rf.gd/whistleblower_complaint_searchable.pdf
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_a69ab6b02d4c4d988b384b6c78594770.pdf?index=true
    • http://kaloruligot.onlinewebshop.net/pyruvate_dehydrogenase_deficiency.pdf
    • http://metiguwuwezaza.atwebpages.com/90074950857.pdf
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_6427ea207dc24f4f8ecc733f6cda7046.pdf?index=true
    • https://s3.amazonaws.com/potamotaz/xolisi.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_off0000d4bd.bin
98b3c90e650f0791ac0e5f090a0c7d8a98c9e28fa1f3fde4a393c55fda606458		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BD 5420 bytes
font_01_sfnt_off0000e73c.bin
dc3b411f00e14a35571f1c4d2d79bb6fa146411cd3401e7cccb302edffbad316		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE73C 10940 bytes

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