Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d0651317ae007d…

MALICIOUS

PDF

91.1 KB Created: 2021-09-23 11:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 91af58d2177290746a121cf48d6a7791 SHA-1: e4bf67510b34a85d156f44531795c8db56010d91 SHA-256: c9d0651317ae007d54aa3dde3a457924a1f7f5a4065f6534f1d9387ec703083d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document prompts the user to call a phone number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to deceive users into initiating contact, likely for fraudulent purposes. The presence of multiple links to potentially compromised or disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://sapporopools.com/contents/files/gedogove.pdf In PDF document text
    • http://spreewaldatelier.de/img/editor/file/58690250133.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/18301699208.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/3849199621.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/83700567006.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/vedojexikex.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/puwiziwukegixojix.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/tipubodobadoxoduletajuv.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/detuduj.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/69080295279.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/95185844626.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/nasoji.pdfIn PDF document text
    • https://bachson.net/upload/file/xulorofezujezojibonowu.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/cbf1dp6v0vf7ss16vgtb88i7ep/naruwanutidozuvowufezod.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/56275794421.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/2121b4840f8d2b8bc2d3603baff42557/febebo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613aed9b909c9---87693655037.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/kozunajemirupokolu.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/be9e4e4644da2d8baefce6f52f88419e/gabamozivazefedezimobi.pdfIn PDF document text
    • http://unseretochter.com/images/file/bomepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=example+of+hard+real+time+operating+systemPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356ba98467c---folijagizadakusaba.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_off0000fe68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE68 11144 bytes
SHA-256: 8c34036d95ca1e16e9456cb7a586d91cf127089aa84617611b527031867382a9
font_01_sfnt_off00011809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11809 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001301b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301B 18028 bytes
SHA-256: 505b0605b82eb6e0fb824a6722f311f4b8c58b68646f6904ca9b03dbc973253a

Open this report in the interactive analyzer, or submit your own file for analysis.