Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e383b126e0c8bc2…

MALICIOUS

PDF

84.2 KB Created: 2021-06-23 10:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 861857088f5987b123d5e2a8f4ffd64c SHA-1: 2ec4e169bb24f28c70306b6febaf36310e420bdb SHA-256: 2e383b126e0c8bc261e814a3f88d0b84cba89a7d2a4267ba7b3776b4ff76beb1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of an advance-fee scam, using a 'predict table' lure to entice users. It contains numerous links to external PDFs hosted on various domains, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or scam payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pistant.ru/uplcv?utm_term=predict+table+pdf
    • https://nada70.org/userfiles/file/37098399984.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/23579788090.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/282ed7199ec45314899f30d7ab754441/zofuzikufepazejevemumof.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d189bb7081---35833277498.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4961080f---vazokose.pdf
    • http://stpatricksreunion.com/clients/84553/File/51653196441.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6a540fb9b---99624562038.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2defca739---96043455105.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b40ccdb8---jomojufub.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfcfd8a559---juvapami.pdf
    • http://domeinbeverdonk.be/assets/files/file/lodomu.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092fdc81269b---62942157697.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2108a2c631---logarugunosipepinufosuzez.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4b0467d9---41982747260.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd005b92e7b---39625105496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f4f2.bin
f74b080b932b97fa67058d7a54f7d72d3bd480b095be7b41e476a1885b392697
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 5112 bytes
font_01_sfnt_off0001065e.bin
66b3684948703bdf24d78f08e50b909e7efb3a3b7c9b88773737d6664cb7c69a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 11668 bytes
font_02_sfnt_off00012e35.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E35 16204 bytes