Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6ebbae541a1625…

MALICIOUS

PDF

80.0 KB Created: 2021-06-28 17:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 792cbd10b27a5d1288038266757bbe33 SHA-1: c1f25275b5a37082013bb6c32b95c4583d2a99e2 SHA-256: 7d6ebbae541a16250b57117cd3800268f7333cc8b70a85a0dea65f7e7c4b7704
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://montaze.org/democms/userfiles/file/saluparefejuwo.pdf
    • https://arvikabc.com/images/uploadedimages/file/79214977150.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/5f8e8b28111e4918ca4ce92af250e671/54189722554.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c82a00cdc---39313229924.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8693c289---25603722818.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/3bf816288d68ede01da4f14c6cc92f68/fonunesidemunuxudus.pdf
    • https://aawyx.com/sites/default/imageuser/file/59615142032.pdf
    • https://topclassgreenery.nl/images/file/rozazexer.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/60d8cc338249dd6dd1bfb5cf375295b9/vagosapizixusiginamumezu.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094053637685---fuxetufalujoz.pdf
    • http://market-oborudovanie.ru/upload/file/93060233542.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78fd0a67aa---63371890194.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2a5942d4f---26038264844.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cec490cca6d---61499331755.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0e4eda44d---54049640631.pdf
    • http://musorcentrum.hu/files/article/file/7932631130.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/c29eb22e50a622753ecbedb32291479f/29937857619.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32e2ec4834---lukorawaragovi.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/73524772893.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9197469b63c74ab4574b5c1fef0c4d4c/70503927915.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/67f4c76cc290f8628e8128c65438ddaa/58139304807.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/c3b4ef9e63d6ee5e6526a619711a267b/94679347763.pdf
    • http://namlongprojects.com/images/uploads/files/21466466617.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/e17d5a791397c322ca423cc473f99831/97091848852.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ms+powerpoint+2007+download+for+pc
    • 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_off0000d33c.bin
792c7111d1f18df7802ba8afc9fe51a914e9c10fe5cbbed17091794135e9f02c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD33C 17656 bytes
font_01_sfnt_off0000ff19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF19 16792 bytes
font_02_sfnt_off00011730.bin
d1451f4355b639b95d309ca2a419519ee26ac79a4f42c7b1fe0df86c566abe1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11730 10984 bytes