Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cc3955b8c8a075…

MALICIOUS

PDF

85.8 KB Created: 2021-09-19 18:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 13bd72bea2e389cd13fdb422c154b46f SHA-1: 312fec58b57b687775bdf1f1507539c94c3b0605 SHA-256: f7cc3955b8c8a0753eeb8ddbd62397e586e9279435cb7e0e8d7004b1ac1c98a4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites. The presence of QR code and callback lures further supports a phishing or scam attack pattern, aiming to trick users into visiting malicious URLs or engaging with fraudulent services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://taichielite.com/louis/taichi/ckfinder/userfiles/files/15128326561.pdf In PDF document text
    • https://dpengineers.info/admin/userfiles/file/30597066163.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/mivexateneredutagode.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/wujemowajajerigufepijigo.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/90099893318.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed44325138---tefiwuwajupekagadin.pdfIn PDF document text
    • https://cian.hr/userfiles/file/80142770737.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/desilazamenuv.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/48540311543.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/pivutenudubamixelufo.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/86602472545.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/966637062.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/mekolurasoxiselan.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/94013332575.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161414b710bbdb---xosikofuka.pdfIn PDF document text
    • https://wineart.online/userfiles/file/85781802645.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/sejonatowulosubise.pdfIn PDF document text
    • http://goref.ru/files/file/78123742749.pdfIn PDF document text
    • http://status.cz/UserFiles/File/4183223067.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/masaropexugutilemapuja.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/rhpmi2e2opofmpqphf6rpm8qdt/98581721753.pdfIn PDF document text
    • https://tcremich.lu/files/files/beduwiwenefivifituto.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/57080826701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=wrong+turn+1+online+freePDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210906/16308823978794.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_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 18592 bytes
SHA-256: 07fba1eee8e22f4bd8eaceec1423403184e6da65cc06e8cc3388d432b40fa251
font_01_sfnt_off00011a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 10204 bytes
SHA-256: 2b3bc8c61ecc6efee8138efbd4dcab26ffebadb27ab4e1dc86a44d0572918e94

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