Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a198d0d49cfb2d…

MALICIOUS

PDF

72.8 KB Created: 2021-06-02 10:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba152c944665f66fc7e2988a7f16f45 SHA-1: beefc6886ee9173339e24bf35d71bb2b5e7c6d93 SHA-256: 00a198d0d49cfb2d2e26ff6b5db4358678760168b52e4af2f3e2d9b15be3c4a0
164 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised WordPress upload directories, disguised as a download for a movie, which is a common phishing lure. The presence of multiple suspicious URLs hosted on compromised sites reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a396da8a052---24211501141.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0b09593ad0ea979a03d6d04ec425297d/88707396304.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/efc8d982734cd3c42e6ce97f00e381dc/vododopisi.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f4ce7e4a891b19d88a7f14d63121e74e/87178428546.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/5b471beb68c000935ca8d64da128aa82/tiredaromedewiwupojul.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/75aeb4a80294d16dd901ea7cefa6d634/numirolosaperagobi.pdf
    • http://mousike.it/img_ins/files/rajigapamubozewer.pdf
    • http://msiutilities.biz/documents/67506523634.pdf
    • https://aimara-bg.com/userfiles/file/soxenuxufazuxarupamewa.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078027ad86fc---fuzuwikiwopofisix.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a241258120e---logitujejabamovegufi.pdf
    • http://www.knickmeier.net/images/pageimg/file/18097779436.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072ccd1690e3---20245253509.pdf
    • http://arch-teh.com/pic/userfile/90539741918.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9925d23ef2---55696182351.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3522386d6ded2bd0cd049c580b5bfec2/denijajorubegisutawe.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/5uch3k8cb4bccbs5oe2stekjnq/64244821975.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=despicable+me+in+hindi+download+480p
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdb0.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB0 6744 bytes
font_01_sfnt_off0000de98.bin
37131c5cf98e55b447f81d9e34382a01f19702b5fb8534179a2e5d0fb6b817b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 5872 bytes
font_02_sfnt_off0000f28a.bin
fc39ab872114378397b44685a9506de7eea7fcd8d58b6169ac7dad283efa2c1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 10340 bytes