Malicious PDF — malware analysis report

Static analysis result for SHA-256 b269200f1b146a76…

MALICIOUS

PDF

152.1 KB Created: 2021-06-29 06:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46abb7a54f4cc8f2303754054e71bbec SHA-1: cf05c29cbbb49027742c6d69d662e52b97f00bd2 SHA-256: b269200f1b146a76c0721621f4f3255bae37aed85671fbab1c437cf9a44545d8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to PDF files hosted on compromised WordPress sites. The presence of these links suggests the document is designed to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd83b8e4cdc---66644642448.pdf
    • http://designbeginnings.com/upload/file/87831326618.pdf
    • http://gocreate.termall.pl/upload/fck/file/89759298496.pdf
    • http://eperon-kochersberg.com/img_db/95335559796.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/n4nil74nvid9emb36702bel05b/rigar.pdf
    • http://yildizteknikelektrik.net/resimler/files/15544849871.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077910c8335e---milonadubokojixe.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/f27f4a5e8d9cc9290adbd31b5090aa05/97627047431.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4d7cac03fbce41a6cfadd2de274b850b/zubokenufoluziserafivuva.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dfe01a472---vopetugolowaniginulatelo.pdf
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/zevopexodi.pdf
    • http://ekolojikweb.net/upld/userfiles/file/93671752044.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090803601916---xozededopasiwukalifubonut.pdf
    • https://afra24.com/basefile/afra24/files/laderezowalifixozu.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/6orpgr1ht1kfk00s8bblkbni34/59421874615.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c613aa9363c---14235937689.pdf
    • https://baohohoanglong.com/userfiles/file/xivul.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608bea954c153---4143928499.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/a9420c2bfaf2d581e98aacc58d658d06/vugevuwigaredakivux.pdf
    • https://ivanda-commerce.hr/userfiles/file/pusuvajusaguvabes.pdf
    • http://live-lessons.net/lcj/web/uploads/assets/file/52521802284.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0c4f22d9f---72865792460.pdf
    • http://bukvoznaika.ru/ckfinder/userfiles/files/64060562700.pdf
    • https://estoniapools.com/contents//files/4003516498.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=before+heliocentric+theory
    • 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_off0001cd5e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD5E 16792 bytes
font_01_sfnt_off0001e575.bin
1c0c199c6e17cbd2baf534d74d2d1ba47d11c8fc43c2623206e1246d028f9c41
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E575 10272 bytes
font_02_sfnt_off0001fc7f.bin
bc64082df62b12792dd1f9a756f8ac9b9896ecb696c9c5849d74aba43867f405
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC7F 17756 bytes
font_03_sfnt_off00021810.bin
ee649568d0eb87f772a938dbbfdb6db24fe9a8fd7fec9d3d6b6ab31994c4bf88
pdf-font-stream PDF embedded font (sfnt) at offset 0x21810 24372 bytes