Malicious PDF — malware analysis report

Static analysis result for SHA-256 468e93c345c1ff28…

MALICIOUS

PDF

69.7 KB Created: 2020-12-18 01:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032938628fd4c8a5433d188c2d334b49 SHA-1: 59d484408a467edc83b52a5db54c83789797db8b SHA-256: 468e93c345c1ff28ddb9dadcaa9a21007fb0b8be22986a429c5f929a45812c6f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded document body, though partially corrupted, suggests a lure related to an academic calendar, likely to trick users into clicking on the malicious URLs.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=brooklyn+college+academic+calendar+spring+2020
    • https://fisegumatiwal.weebly.com/uploads/1/3/4/7/134722042/5481366.pdf
    • https://litulivugaz.weebly.com/uploads/1/3/4/4/134463412/21146b252e.pdf
    • https://mejofeva.weebly.com/uploads/1/3/2/6/132681501/tilokirotevinav.pdf
    • https://wikerewozuzap.weebly.com/uploads/1/3/4/8/134868679/fozerut.pdf
    • https://jadigitunuw.weebly.com/uploads/1/3/4/6/134672933/pawesurinuga_kinojesexosevu.pdf
    • https://fufajogaxofamu.weebly.com/uploads/1/3/4/6/134627879/2604e1a.pdf
    • https://xupulepil.weebly.com/uploads/1/3/4/3/134322414/jonetimejapelesogoja.pdf
    • https://vigakamodibit.weebly.com/uploads/1/3/4/7/134770941/sulubi_zewizofepajone_fazes_vabamebekosifu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bcd3cdad-c506-48f3-a0f0-bd12c186e365/58121162816.pdf
    • https://uploads.strikinglycdn.com/files/c6278a46-2f09-4991-b429-27fe6fdecf46/fonadududedid.pdf
    • https://uploads.strikinglycdn.com/files/00278aa5-5a20-42c8-a366-72d3a0cdf7e4/michael_c_harvey_inventor.pdf
    • https://uploads.strikinglycdn.com/files/86ac6a5e-b3ec-4858-912d-e736998d956e/83122180967.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd071b3fdc31513a111413/1606223644379/37662496583.pdf
    • https://static1.squarespace.com/static/5fc27abd116eb00e3c55ea17/t/5fcd66b80ab5d62feb05c578/1607296697578/tefudijarilejev.pdf
    • https://static1.squarespace.com/static/5fc6665e11f6a41984ab41ad/t/5fc9e4b96a94db17e493afe9/1607066810273/iron_man_bomb_game_apk.pdf
    • https://static1.squarespace.com/static/5fc15fe03dfdd95b60d86875/t/5fc96abf87997d7b5017315b/1607035587191/one_punch_man_season_2_episode_9_review.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_off0000d0ed.bin
0d3f7db2a66966cf324e0ba66001ad0e4d15efe8744f336b4bdd575d02501f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0ED 5880 bytes
font_01_sfnt_off0000e4ee.bin
46e4c391ce80bc2203a85adbda049e00bb569d966806757b84df55a10f323d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 11052 bytes

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