Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbb0509ae483119…

MALICIOUS

PDF

99.4 KB Created: 2021-08-05 16:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bf1a97e180508c105869e6757b9b6aa4 SHA-1: 07e35056c85dbfac3ac84b1929d6d86042f4857f SHA-256: 5bbb0509ae48311918dc9524b8f613eafbfa77236e48584e5b572b005934b682
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9eadf8db7e97aa771eb900c36499e806/ponejetokofigojodada.pdf In PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/dio55ei2opfg8lfrp5c0q6un4q/74266591400.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/9b96a5937d9df02c5e0b83e64204c288/mijosobujuzetusojepomixe.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/3741980781.pdfIn PDF document text
    • https://temahr.hr/files/fobepidirifu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e85ea7c1761---fanupo.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/kepofuxir.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/5dc965edddbc36c096a79cdd705d5ec7/vesolusotako.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1bdf1e1f20f4537ef58fc3596926dac2/dinudegulijiloduwuk.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/zibazezidegorilupiko.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756a1f125c3---28684667403.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f925c648d09---71309427621.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/96db8bdf88d90ef0323012c72c2d6b61/zamizaxofi.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f269ce33b91b6a941736e890e1073a9e/doruso.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/43185252583.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/240066fb1562ee211f0ed546df5b21f4/69350645019.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aff19ab9244---fuzolerasaxito.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/4501243433.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/05a7c8531f14e55bf5def4a2771810dc/55180158368.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4f035903ef32d80e0d0c2866fa28cc9f/71069815843.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071a8d4a189a---89948600102.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6357ecaca2---23869672088.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/1b5f527b14a4047174930e25ef05d1db/komegumijunufekofufuxik.pdfIn PDF document text
    • http://mylodge-naoshima.com/natejorinipemegoxasig.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/suwabojagilebem.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/57366301273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=briggs+and+stratton+450e+series+oil+capacityPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 18064 bytes
SHA-256: 2458519eb7b655ce14d3132c06038675061a9a6bd25f18acce8de074effb9688
font_01_sfnt_off00011be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE9 18240 bytes
SHA-256: bd7e8661d623d1ae06eb916672134fa8e3e950d5ef89235a694609c9a71edcf8
font_02_sfnt_off00014bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC6 11192 bytes
SHA-256: 437b73fd0618ea5da7d496ab63bcf45bb5b74c5a9653ca788f356d6d0a743a26
font_03_sfnt_off000165f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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