Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddd9a30caab347f…

MALICIOUS

PDF

95.1 KB Created: 2021-09-18 03:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6cd676306ba71c58d0737b34ca9267bc SHA-1: 54f771440cc1192e52971c248bab8a0609b490e0 SHA-256: 6ddd9a30caab347f2340667f84b4cfccdd2ae1f54744e439011dc7f884a666d3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing pattern, where the document likely prompts the user to call a number. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to malicious content or initiate a fraudulent interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://garglob.ru/uplcv?utm_term=fire+tv+player+on+firestick PDF link annotation
    • http://moestuinwebshop.nl/userfiles/file/losomasutewu.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/68183796338.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/66008428438.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613483302f52f---borodoxiwumi.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/rawesamikufe.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/kusulikuzowifilodokoxij.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/79222467949.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/72530311299.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/51670447910.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/63319783506.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b71d6e4ac6---47887173765.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/givapozijidesiw.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/4607962035.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/63755808656.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/37573220126.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/bosajonugofovekisubedesa.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/69181385106.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/12701255720.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/14901932752.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/tusawajofim.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/22842426162.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/tefov.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/lulezolefegera.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_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 20460 bytes
SHA-256: 192d529ee6b57e820ded07b4acf0eed1f30c19a5ab11d64ada2167b0dea9f2af
font_01_sfnt_off00013e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E02 10724 bytes
SHA-256: 43284c6c7cf9f9741eb77b7860b59f27dcdacec4e36b41ea84cb04a8ab3b4a4b
font_02_sfnt_off000156cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1