Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c2317bdca4e9b7…

MALICIOUS

PDF

75.4 KB Created: 2021-03-06 13:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e790d2411051cba004314f7dd85ec683 SHA-1: a2b3a163e405e50d635ee7ef13de6120aad262c5 SHA-256: a6c2317bdca4e9b76220d0f28292e44c0c6a02bc30c6aafa1b49179a58272fbd
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, includes a search query that likely serves as a lure to direct users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=dua+qunoot+bangla+pdf
    • http://fudidudigas.iblogger.org/45066848129.pdf
    • http://jadogaxarabu.mygamesonline.org/dungeons_and_dragons_modules_for_beginners.pdf
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5fec1d571d242.pdf
    • http://viwimewi.22web.org/9751195125.pdf
    • http://ziminedefus.iblogger.org/zusugiva.pdf
    • https://cdn-cms.f-static.net/uploads/4417033/normal_602e75e4ccc39.pdf
    • http://sibamonowoli.22web.org/kagitapazexef.pdf
    • http://kutufirix.iblogger.org/affidavit_format_for_ccl.pdf
    • http://lalikexitaxixix.getenjoyment.net/70297397807.pdf
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5fdeac46e28b8.pdf
    • http://werikipirojenob.scienceontheweb.net/57869620208.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://koxowasone.epizy.com/xujaxomususularibine.pdf
    • http://firuneta.rf.gd/34637120236.pdf
    • http://kivozusemu.atwebpages.com/how_to_adjust_tension_on_bernina_730.pdf
    • http://muxovunibo.epizy.com/nattamai_teacher_bgm_music_free.pdf
    • http://xanagenijumujoz.epizy.com/nupaboxesapuwoj.pdf
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_ffa56bd800974599a1c1f3cac6d1fff8.pdf?index=true
    • http://rinimodosejowuf.myartsonline.com/is_there_a_cheat_to_get_money_in_gta_5_online.pdf
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_12860efc38a1401b9c949a73092bc25c.pdf?index=true
    • 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_off0000d426.bin
5c754063901dc05aa159e2d2e93ee789b762582dce881a7daac02c5e1234b794		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD426 5200 bytes
font_01_sfnt_off0000e5e8.bin
e2b8a17e3fa0cad21ae3932bdaf0e731b5a0efd7fb5fd2f9883b7c6047268fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 10288 bytes
font_02_sfnt_off0001093c.bin
92554ceaa85bcc1f13055d5f8404561fa96be961d2acc36729d648aa9d76a6c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093C 16680 bytes

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