Malicious PDF — malware analysis report

Static analysis result for SHA-256 1117297f3db390c8…

MALICIOUS

PDF

68.4 KB Created: 2021-09-14 13:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3086e93de4f1a636766ef99c64668c3f SHA-1: 6f6eacb85705106d3571fa8bc5c74e63a18292b8 SHA-256: 1117297f3db390c825367edb674fab5122b15ba5395a76d376908133378232b4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and IP-literal links pointing to various domains, indicating a strong intent to redirect the user to potentially harmful websites. The PDF structure and embedded links suggest it's part of a phishing campaign or a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://laborke.ru/uplcv?utm_term=tardis+live+wallpaper
    • http://bxbrdh.marketsearching.com/upload/files/gafokedanases.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/0gau8m4c193od8nduqcdkbr8b0/jifux.pdf
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fawuvibuguzanofufomaxu.pdf
    • https://rumahbaruku.com/contents/files/tojavow.pdf
    • https://dalilak1.com/userfiles/file/55037377728.pdf
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/29711664824.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea1e629b27---lupanojexifiza.pdf
    • http://ruresept.ru/files/file/jerenufibibetaj.pdf
    • https://dallaslandscapedesign.com/media/files/84197319119.pdf
    • http://www.fdconsult.qa/public/uploads/cms_files/komenonasimi.pdf
    • http://langeline.com/ckeditor/upload/files/sexutetuvisumesaji.pdf
    • http://stisk.com/file/jukazodepuziz.pdf
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/zebag.pdf
    • https://penal-garazh.ru/files/wodunikujexugidijokakilir.pdf
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/53821258579.pdf
    • https://akproauto.com/nbloom/fckuploads/file/lamulapuloluvolijajasif.pdf
    • https://permargi.com/files/galeria/files/17631270585.pdf
    • http://esoftland.com/userfiles/file/badegukogapusosijageda.pdf
    • https://betsin.org/userfiles/files/kobozarusanaverotuwel.pdf
    • http://traslochimontalto.it/userfiles/files/nikaruzedenixo.pdf
    • http://malovanesklomh.cz/images/file/47205933096.pdf
    • http://www.chatanakonci.cz/userfiles/file/97998795705.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0B 16792 bytes
font_01_sfnt_off0000c722.bin
79e4ea3d00d2a5399be74b00751b2e9cdf0316bab5d27ab0f682f4c1d01e3b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC722 10176 bytes
font_02_sfnt_off0000de07.bin
ffa86a7bd79d9770fc167e185cbdbf7cb8b190704784e6e65f90e6ad8f6edf6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 15392 bytes

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