Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cdb8b43c574544b…

MALICIOUS

PDF

81.8 KB Created: 2021-09-24 20:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8f4c686520602fe1bb7d26cf8a32f67 SHA-1: e7f808842f4fcf0af8b2cc1fa22a821a28090bf0 SHA-256: 3cdb8b43c574544bba36d851cf8244eb4fd3a8efa18289694768aaa60fd363e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous disposable domains. The embedded URLs and the PDF's structure strongly suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 5

  • 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.
  • 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://awfiowv.love-mrt.com/upload/files/47120409798.pdf
    • http://pttaccounting.com/userfiles/files/xesufedizodijedakod.pdf
    • http://telesson.net/_UploadFile/Images/file/kiwonobil.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6fcf7e72dca2ffe56612e1aa947d3f6a/41896814888.pdf
    • http://coming-c.com/userfiles/file/65593289124.pdf
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/dipoge.pdf
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/31424425436.pdf
    • https://gsacademy.ge/uploads/files/46316840677.pdf
    • http://ttfi.org/app/webroot/userfiles/file/8575561006.pdf
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/busukokokasudesokib.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/43432011626.pdf
    • https://wheelmartthailand.com/image/upload/File/4179605205.pdf
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/safogeroso.pdf
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/14004709557.pdf
    • http://musiclivemarsala.com/userfiles/files/21136391520.pdf
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/23204741275.pdf
    • https://corcreation.twbiz.me/data/fckeditor/files/20210912_030647.pdf
    • http://tensoinox.com/userfiles/files/78474894299.pdf
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51787527554.pdf
    • http://mstreatmentadvances.com/userfiles/files/59635477294.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/583c82b7ac2e284296fdd48d5be17511/29547962668.pdf
    • http://ieeepes-thailand.org/app/webroot/files/files/41472871833.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=letters+of+a+stoic+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bba3.bin
d880464df3a0609dec08248359392c15c719c383c2a5ea3cab5fb8ee15ef87f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA3 10420 bytes
font_01_sfnt_off0000d368.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD368 16792 bytes
font_02_sfnt_off0000eb79.bin
64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 16060 bytes
font_03_sfnt_off00010085.bin
c737c1571b827a9af515084efd4d135d2c05ce8763284746c5506df3322eddb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 1664 bytes
font_04_sfnt_off0001086c.bin
3c427488992e2d8192557b3773689623c0c05a635dac32c9aba6f88c0aa18e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 18776 bytes

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