Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc0ee73f9a999e3…

MALICIOUS

PDF

73.5 KB Created: 2021-10-01 06:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a323de98a97be105886ccfbc4c669606 SHA-1: eb9ad67fc223a6f2d75beec6161fe1c4a4a657c2 SHA-256: ddc0ee73f9a999e35f260d914b3655eb7e4af50a47cf8501471fcf5348e28b37
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech support scams or refund fraud schemes. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it may host or link to malicious content, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://letnipohar.cz/upload/file/duxomegugagoji.pdf In PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/64899170439.pdfIn PDF document text
    • https://spacio.hk/attachment/file/fejikuxemorumopanopep.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/79725094641.pdfIn PDF document text
    • https://khanikango.in/file/sizabunekutenumaba.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/ripefafipitow.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e07372da7a---wesifodewamopajajusuga.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/vadumewe.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/zanebujekufadujidon.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/23249336345.pdfIn PDF document text
    • https://tekartltd.com/upload/files/dawimafuz.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/nulik.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/72354364339.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/29309277555.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/387d82hhgc6qm4q9rm5jlgl5ii/dosojowirodarebazubi.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zusedo.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/90593230171.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/50109846633.pdfIn PDF document text
    • https://fishboat.hr/files/posaxonugorid.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/28677389057.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/40439028026.pdfIn PDF document text
    • http://blueyee.com/upload/file/302046012665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=android+tablet+flash+filePDF link annotation
    • 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_off0000b8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EA 10572 bytes
SHA-256: 506293765926c91f33ec3193d8b5adb31fde39da59bf5167fb0c1c2f7a9e1c52
font_02_sfnt_off0000e8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F4 18412 bytes
SHA-256: ca725da45728f161912c535ae05685f39585c24533f15be56b7a155f59b5c461