Malicious PDF — malware analysis report

Static analysis result for SHA-256 6076d7212552a70e…

MALICIOUS

PDF

86.2 KB Created: 2021-09-01 17:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4164a29cb0a4d93c289f7ecf64d27111 SHA-1: c039258a2e6ba0d8bfa5fa93a29d93b3916f7e50 SHA-256: 6076d7212552a70ee4e5eac2f7e185755a5322775925b1ef1461312f1b313881
164 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution campaign. The presence of a 'download button' heuristic further supports this, indicating a lure to download a secondary payload. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fluitec.fr/ressource/site-image/files/kowofawixetox.pdf In PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e999dd47defd0f92bff1150be1dd6a5c/81516313492.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7197950514.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/merukuzulaga.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/96359226500.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/liwubeditaroduzida.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e09e32e2c---ruvasaxaxeponelelisoxen.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d734f000e93---wufig.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/fezalupudo.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/4dthmv4v41t6jaod6nq5j3vadl/45108629698.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/3g45c297vjsqua8qq8fh07i779/86344408875.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/66439577355.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/nawoxudip.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1658a281b64f46df97be7ef28c13e7ca/93946044971.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba22802fc1b---25639115657.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/36391313093.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/pujokoxifabosi.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722f307872b---23019134394.pdfIn PDF document text
    • http://beiks.info/public/file/mopulozotopadufimunoz.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/bupisobav.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210813_432DCB0DEDE4D161.pdfIn PDF document text
    • http://xycrusher.com/d/files/bukapub.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160eca42c3b75b---89835870755.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c53b7284508d5875880e849c45dd5a17/nulerukisevesaxamigugi.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607536382e394---53507879009.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210626_E9376E13B29C5337.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=chaal+jeevi+laiye+download+moviePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 10576 bytes
SHA-256: 99603bf3eb1a2eebd103aa19d00bd807d4f50bfdd434fb584e95323608f1fd0c
font_01_sfnt_off00010427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10427 17724 bytes
SHA-256: 8c17e7e33eb90f2de9042b17c822fe6edfa52ecc7deef1cc954aaf596f65300f
font_02_sfnt_off0001318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1