Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf079bdc60b94ba…

MALICIOUS

PDF

93.6 KB Created: 2021-07-14 09:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92cd9fa671a8b59f35e6c5b0ad965533 SHA-1: 8e33932bba2be1fc4bc271d9580c554d83f860f5 SHA-256: 2bf079bdc60b94ba471c5790b7a3296ac7f6261bce896a354e9a80f1f0a9fc87
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, indicating a phishing or redirection attempt. ClamAV and ML classifiers confirm its malicious nature, likely serving as a lure to download further malicious content or redirect to phishing pages. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://ajtoablakcentrum.com/_user/file/wokirodomonagebepizuw.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210513235931.pdf
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/zuxejepufibikopi.pdf
    • https://soudurelausiere.ca/upload/editor/file/dadegoxeguworeleferumur.pdf
    • http://ufnk.fr/app/webroot/files/file/wewuxen.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160e4905181536---43050792522.pdf
    • https://hijaulumut.com/contents//files/fotudaxigikuto.pdf
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/32649772598.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/566cd59cf8ca0bb6d2611d91a6dd82b2/pesonanoluvesu.pdf
    • http://ifa-astrologie.de/userfiles/file/vowapekuvapife.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ad99f83ec28---ravosonepiniximosafegigaz.pdf
    • http://hodori247.com/uploads/files/77450538463.pdf
    • http://sacoorhealth.pt/site/upload/file/virurulujapedaku.pdf
    • http://www.monts.sk/upload_images/file/fakajasebu.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d303c20cfaf---31800545460.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/61d59d11643d71b889bfbffea24f54c1/dugozakakupijav.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c25647e6f40---70513988845.pdf
    • http://karpatskiles.ru/store/file/xufes.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/em6si24qnbpdpj9o49mhc2rbk1/nanuwemixidowamav.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/135f8h3e0ng07cqjuquoatagd0/16367636721.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d00cbe600f---92748018457.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=independent+worker+self+employed
    • 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_off0001089c.bin
fdaa999c97be7698418667ef2636dc29e56a21d9381b356d301a8dee26101ecc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 10648 bytes
font_01_sfnt_off00012104.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12104 16792 bytes
font_02_sfnt_off00013916.bin
ba6e73763044f08c6b6aa586fdd4627476492e115296f4b0ab952f2862582379
pdf-font-stream PDF embedded font (sfnt) at offset 0x13916 17724 bytes