Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64a3f51f50f009c…

MALICIOUS

PDF

83.5 KB Created: 2021-08-27 22:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06db3ea371a0e5edab636bb16ddc1b91 SHA-1: de937f6184ced6e5240951a842bf371ae03901da SHA-256: c64a3f51f50f009ca7f7b05dd4d9421005cb845739c8c4a3c55d7159ca6471b0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting sites. The primary purpose appears to be redirecting users to potentially malicious content or facilitating SEO manipulation through a network of linked pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/digilojesobumujakatu.pdf
    • https://otartufo.com/ckfinder/tartufofiles/files/22042357089.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70f278e0a7---rofowuso.pdf
    • https://aspaeng.com/files/image/files/94902266278.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/50280628281.pdf
    • http://maychamsocda.vn/images/userfiles/file/jafaworoladetige.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/782b811adb1065f43967785ad4207f3a/barowem.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/cff98fbeb451a89f4a84e6714253f0c5/38633110117.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960d95a105a---juxuboxanodatowip.pdf
    • http://kibbkw.com/uploads/file/rumutaxorojomav.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/1b14ddbr3he41e346ov826h7hv/bifubekenetijeku.pdf
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/pafizakorapusogeb.pdf
    • https://malashealthcare.com/userfiles/files/73055418216.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609098bb98ed5---49228572761.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16070d6bde11ba---pupemefurobiwofux.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/jhijo3d2imediko1r9ds1thbtv/13293625378.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9c9e16c739eb9eca39462e3d63f2dc96/mojivaparugoge.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e68999bed3b---zivuzo.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16079a0e16b320---zadodasifedevabekerekubar.pdf
    • http://kleinschaden.expert/userfiles/file/86929786157.pdf
    • http://2rent.gr/userfiles/file/nigebajanafenisufatapobor.pdf
    • http://ddgasul.com/userfiles/file/25601664396.pdf
    • http://nacyc.jp/Upload/file/26332046584.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/2d3409dba52be27b94549c7c33096627/zinazunegulotawizidu.pdf
    • https://terminarz.online/kosmetyczka/krakow/files/ziligekerikidewunonalu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=computer+hardware+complete+reference+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_off0000e324.bin
f315400d80cbc2b6db15fa4dd4f53cbcbac760da659e0bd2d9d4602cb4898e30
pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 16616 bytes
font_01_sfnt_off00010e66.bin
f106b62bbeb0aa95e20176bf1003b2be51f5b0ad5cf1d9f8b3f21b75f52b04a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 10844 bytes
font_02_sfnt_off00012756.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12756 16792 bytes