Malicious PDF — malware analysis report

Static analysis result for SHA-256 7076cc3fc79ca165…

MALICIOUS

PDF

96.2 KB Created: 2021-06-30 22:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1baf4744134c476921cc513855fba45a SHA-1: ccc59629178df07d348084eb7af1a62751e2a2f2 SHA-256: 7076cc3fc79ca165bffb08eb7c09788468c410bb831f0a38a3f72ffc55ea423c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, likely intended to host malicious files. The ML classifier strongly indicated maliciousness, and the presence of link farms suggests an attempt to distribute malware. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b1eac848c---72055059306.pdf
    • https://harkakotony.hu/UserFiles/file/79347050797.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160791a674c0b4---40680836897.pdf
    • http://amirafouad.com/uploaded_files/file/66062484427.pdf
    • http://aarogyamedico.com/userfiles/file/8738291872.pdf
    • http://bertrandetgastineaudesigners.com/userfiles/file/kubireduzejim.pdf
    • https://tmtteks.com/files/kibixo.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4c1f949af31ec1a145f8a8fffa8306b5/95364047276.pdf
    • http://apexnepaltravel.com/userfiles/file/dopivopetiduli.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/15d89bc02196e27935a58e72115d45c5/namexon.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/bdbc5197276874403e4f1b2ecec42706/30306171552.pdf
    • http://bartuceviri.com/userfiles/file/94788307554.pdf
    • http://studiolegalezullo.eu/userfiles/files/97386582529.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcdbbca730---9829302380.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/276bb21e624ec42af0d30bec503a2c20/zuserigewuxelugux.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ab418d48f97ad6a487d447bd0edd0608/2858841012.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802255894bd---2063508433.pdf
    • http://jinistudy.com/_UploadFile/Images/file/85571276405.pdf
    • http://amandatravel.com/userfiles/file/vopogadegelopu.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099acc26b9a7---8158869159.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af70b56eb87---42531501146.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ffb13c6e2f867735dcaba19ba0432d72/tuvukezujuvivewu.pdf
    • http://gelateriacool.it/userfiles/files/93738235911.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=chinese+army+spec+ops+training+manual
    • 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_off00011214.bin
37ca8d01918c063f9e676c5a7b37c959128b557247a58eb5dc659aacca520951
pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 18992 bytes
font_01_sfnt_off000141cf.bin
f470e88c8598a5648aeb2778b3455346be89400db3364130959dda3aa3cce2ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x141CF 11064 bytes
font_02_sfnt_off00015b7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B7E 16792 bytes