Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a97e04d8bf4a4dc…

MALICIOUS

PDF

79.3 KB Created: 2021-03-08 22:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d110cb1079940298dc2390a914baac2 SHA-1: b47015c1acff7f61c14d5961163f1a122a2a73c7 SHA-256: 3a97e04d8bf4a4dcaacde57dec312507ee6824e26316c22313a6f7243892f320
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host numerous external links, likely for SEO manipulation or to redirect users to malicious sites. The presence of embedded URLs and the document's metadata indicating it was generated by wkhtmltopdf further support its use as a lure. No scripts were extracted, but the overall structure points to a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/award?keyword=types+of+allen+bolts+pdf
    • https://cdn.sqhk.co/zekafomaze/evBIihz/53320362156.pdf
    • https://cdn.sqhk.co/mevazasid/POgf2jf/search_quran_ayat.pdf
    • https://tadafemuge.weebly.com/uploads/1/3/4/4/134480681/203f6d5cb.pdf
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/gerufoma-gumupoz-sixawadipa-fagerikom.pdf
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/788cc4f8908b.pdf
    • http://tarekupi.scienceontheweb.net/zarujaxudoluvinijatiguza.pdf
    • https://cdn.sqhk.co/bebetirifam/jiPyjc4/batezulenojikavofifigefe.pdf
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/kavixu-wagog.pdf
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/867c9a7.pdf
    • http://bejisosubonito.sportsontheweb.net/dadosujenozewe.pdf
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/1958042.pdf
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/f147cda64bfb996.pdf
    • https://cdn.sqhk.co/mogizilo/jdsihYU/speed_moto_bike_racing_pro_game_3d_hack.pdf
    • https://mazokaru.weebly.com/uploads/1/3/5/3/135303974/461701.pdf
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/gesaxiw_lemenidera_fapatatetomez_mijolagenunas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/baxegezivumi/the_raven_edgar_allan_poe_worksheet.pdf
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_5d9c420ea37b4761bf360169b9937215.pdf?index=true
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_1af984e3c82d418897e7ab9d2c2fef91.pdf?index=true
    • https://s3.amazonaws.com/wozowuledij/1706804016.pdf
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_3f7a76b9196943cf99f125fa01609f25.pdf?index=true
    • https://s3.amazonaws.com/gedexim/asylum_2005_movie.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_off0000e570.bin
ce3a4f6792a09cab426b94e73188a6162d9d27994e42cf98fb93020b2afc7cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 5132 bytes
font_01_sfnt_off0000f6fe.bin
e34dc455158b61fec253b32d748fd1287e076734e5ec040d10630f77641ae120		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 10428 bytes
font_02_sfnt_off00011adf.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADF 16164 bytes

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