Malicious PDF — malware analysis report

Static analysis result for SHA-256 169feb637381d5db…

MALICIOUS

PDF

90.7 KB Created: 2021-06-26 21:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa6dd129554793b0fdeefadc6cd46b9d SHA-1: 44320334c1612b7af71099bc3ee4cef01f364be2 SHA-256: 169feb637381d5db65a5319ac1aabb044ea66cada7055d8d8073a58a081af1d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • 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
  • 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://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/1e01a51ce6015dc81b725903c13e679e/98850255083.pdf
    • http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/95668320222.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/rpd0pb4tqjldpqe06l42lo1jt4/memelaw.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b08a9935076f1f3ee3229273887bebc6/fodotuzilatovalovurezija.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/3c85ed883da49fe447afe6565f0c14ab/bamepojowovit.pdf
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/25503869741.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/856dfa0aed51ed1099f01c85e8fd84f3/tejubunakivukekure.pdf
    • https://aravlicraft.com/cmsCart//upload/file/folijufixoxaxonivaxedefuw.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3ovks0c6s0bv10cl87l54l0g42/61449860897.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/54ae65f9df61e12ba5c813d9723b41d2/famivaguduzekosolevena.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eabb9e30a---23477210448.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/282ae24d98e5e91fbcd142c14454a3c9/18885922829.pdf
    • https://szekszardportal.hu/userfiles/file/29783997053.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef2352067c---84472171876.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ueqj24ut3lmqq4lq8vfdhsf76g/zavegalevigulev.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/eec908cfc6c0d57ef5eb172075836ec9/mogor.pdf
    • http://kulturazebrak.cz/userfiles/mofesutozineronipun.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c594172de59---zumadiwera.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/4f5e0aab3096b7f71060dc366610df7e/zoxumurajukuzun.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c8fm4hma1obuvk62vjd5jb0oau/58440906129.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/n6vt6gokuo76rqd8t5enlsh3m9/19064606262.pdf
    • https://termofriz.rs//files/fufowifodewegufev.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=imo+beta+old+version+for+iphone
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e988.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 16144 bytes
font_01_sfnt_off0000ff03.bin
83b3522416f34baef2c3a078fcd2a8b178c38c541bb4af932d8dab61239eae5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 17268 bytes
font_02_sfnt_off00012bfd.bin
0bcfd2f416e6cdd5b1f8af08c4d8c7a3d01c20bf3404176f867a91a9411a5bf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFD 10920 bytes
font_03_sfnt_off000144d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144D3 16792 bytes

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