Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e34a6ee1a166be…

MALICIOUS

PDF

70.3 KB Created: 2021-09-19 13:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 231a645adca8c69a8f429ef46afd422d SHA-1: c8d152dbc201efd50b3dbfbf2e5d968bc8e7903a SHA-256: 12e34a6ee1a166be07b4c1304b7b37d11e0e14b12ed459a3d3404445eb535b75
124 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The file contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were extracted, the structure and numerous external links suggest it is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

Heuristics 4

  • 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
  • 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://scales-center.com/shop/fck_file/file/vemiwemude.pdf
    • https://kaptenhoki.org/contents/files/7994366745.pdf
    • https://wedding-photos.cz/userfiles/file/jovob.pdf
    • http://revize-elektro.info/UserFiles/File/48567929084.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161315946b1c05---59031335529.pdf
    • https://srldirect.com/ckfinder/userfiles/files/sinanogokareged.pdf
    • http://theclelandgroup.com/img/upload/file/89436162774.pdf
    • http://bellamy.tw/uploads/files/202109050913434221.pdf
    • https://sadhankendra.org/erc/media/97870798104.pdf
    • https://derfo.info/resimler/files/warugijuremukekakutumeka.pdf
    • https://masihpt2.com/contents/files/mupusola.pdf
    • http://xahscw.com/userfiles/file/77224697784.pdf
    • https://presentkompaniet.com/img/content/file/71784501454.pdf
    • http://digivideos.net/ckfinder/userfiles/files/28347988133.pdf
    • http://quincy.pl/ckfinder/userfiles/files/85373787278.pdf
    • http://maymaygiaydachidang.com/upload/files/latelux.pdf
    • http://tyextractor.com/d/files/niwitizajaxokumunonunar.pdf
    • http://nzozkrowodrza.pl/uploads/editor/file/femanij.pdf
    • http://ayurveda-shiatsu-nice.com/upload/files/pedewibumerupam.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=best+website+to+download+mod+apk
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda1.bin
295e0ef5ea6f029429627869603a494b413ffead2649334b60e94a6ce0d848f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA1 10824 bytes
font_01_sfnt_off0000e671.bin
6ae9c130412dd969cebfd58e9e9fdff5d8623907f967eabae5e569086fa8a069
pdf-font-stream PDF embedded font (sfnt) at offset 0xE671 17828 bytes