Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ed101a340e1abf…

MALICIOUS

PDF

82.8 KB Created: 2021-09-15 11:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ab8722b886b504d0d7eabc41bbf0bdf4 SHA-1: a665936a4a9b4cffea83088a5135cd0e37552a35 SHA-256: 75ed101a340e1abf517c25d56ecd8387e9553b36055d3d031a5a83f53d62a840
176 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://drafthe.ru/uplcv?utm_term=cat+ninja+html5 PDF link annotation
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/jekuxul.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/32355978659.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/gukog.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9d5ca7f83---nireduz.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/nukumodeta.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/78339409858.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/t4ph3a3fi3asnksce7rsrkj46e/zanogubiwevibosaz.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/94ab10895bc2e22ab97d82a0b9938553/62322989416.pdfIn PDF document text
    • http://aquatherm-graz.at/files/32573847009.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16131b1c688124---jimegevugebutisimuguje.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/simasubekurem.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/jikupamavuz.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0b609c6a7a9e06f56f62912a34a60814/76923842286.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/dipija.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c495c0254---44178748748.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/gusasifawo.pdfIn PDF document text
    • http://innotack.com/userfiles/files/72009946141.pdfIn PDF document text
    • http://wsm.hk/images/files/pemapozulajubu.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/sadagaludi.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/modefovawa.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613472e9d9cf3---42218544869.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/61585429477.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/sowebigopovarivepitiza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 10148 bytes
SHA-256: 737d0358d5601f592ca3b9701108f7a9dad6746c4722c15525595fcf9929ba57
font_01_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 18512 bytes
SHA-256: 0b12b955413c819fb2988fa34be5a2b2ab2e1df6b969f825b822a7f88c4d7afb
font_02_sfnt_off0001257b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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