Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cfb60f3f07882f…

MALICIOUS

PDF

67.8 KB Created: 2021-09-20 07:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 422897326165da91d1f8d9e768af43ea SHA-1: ee5fa158e6c6c956649dc57040048e38740bd4ea SHA-256: 22cfb60f3f07882f52870146317147281c7f36b1c0346f6eb2bdc3c9f1600c46
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6322

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yavuzselimvakfi.org/resimler/site/files/jizatisanenusipe.pdf
    • https://mimpiindah88.com/contents/files/rogejelodaxosadosojemupu.pdf
    • http://veterinariacasettamattei.it/userfiles/files/jiwukixiwakixenizutugow.pdf
    • http://novelinternationalschool.com/ckfinder/userfiles/files/tajisipeluw.pdf
    • https://mayphotocopydogia.com/upload/files/7034934968.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa4d13db13---migunoninogig.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327ea7e3431---7576500472.pdf
    • http://rgn2u.com/userfiles/files/88949387582.pdf
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/94157538227.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/51168903113.pdf
    • http://abwnickersonplaza.com/uploads/files/18489062308.pdf
    • https://olboihorgaszto.hu/editor_up2/89304534898.pdf
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/duzumupigogirevojezob.pdf
    • http://descanso.verareyes.com/ckfinder/userfiles/files/93121172741.pdf
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210920060646.pdf
    • https://exam11.menapoint.com/app/webroot/upload/files/64124975276.pdf
    • http://lezeckastenakosice.sk/upload/files/94514366818.pdf
    • http://cableesmaltado.com/d/files/61441860330.pdf
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/92044961010.pdf
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/vifilale.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139ecb616f31---9015941429.pdf
    • http://naturenhuman.com/app/webroot/userfiles/file/sefuzejafewode.pdf
    • https://www.seblocation.com/ckfinder/userfiles/files/43578212370.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=tablet+clone+app
    • 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_off0000d128.bin
c7517bb517d1cc199eb48661fccf6dd7dd8de937e65ad510639104bd42231e8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD128 10112 bytes
font_01_sfnt_off0000e7a5.bin
698578eb8e802023acea6ee3f5c599041d8ef967fade9764a6e2b3633b97d5f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 16800 bytes