Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8f27107e4e8799…

MALICIOUS

PDF

85.0 KB Created: 2021-07-05 11:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7716f65de291a3cd60cc1a0f7c8fc02d SHA-1: b3ff4580f9ce383771a73005849c7b7d2dae9fb5 SHA-256: ee8f27107e4e87991bb127ea7642e0500fad00824e07c87875e8c1e8edc50b2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious content. The presence of multiple URLs on potentially compromised sites indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082f999c979b---107174630.pdf In PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607976a79a559---bemumewe.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/linadoruliparotenet.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/81520606112.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4fe829a4089618476ee0a33bd59cf90a/1023636858.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e74f1890e---luwuzukewafu.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16075701892dea---bopedurono.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b118d89ed---jorajumemimabijijev.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/95217650329.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/lawavisonikosasutefex.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/wiwozuwaxoje.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/45474981227.pdfIn PDF document text
    • https://davaocarrental.com/images/file/36857566020.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ab14263f72828ebf2cc29fa4ac11c4d2/bezetavujulasuroxurovedo.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/jukitomojimedotufefulilo.pdfIn PDF document text
    • http://vtaky.sk/media/file/ziredanupozi.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/eec0bec31ed49081b6927954fd856972/34466721535.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/70b16d162cf1b3b4ad14c8ede47b0f60/wexogumogipujulix.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a838064b3c8---bawuf.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/girakixemujojugetu.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073f45a4334a---wirumopejesulefoleretuje.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a19af5f1a5d---96956356371.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/tuxomazotulugidozoxuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pro+immigration+policiesPDF 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_off0000e8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 16924 bytes
SHA-256: 1cd0f6ad70d82f836e46b125772fed268a66aaca857a7850e660c6074d04c9d8
font_02_sfnt_off00012cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF5 10720 bytes
SHA-256: 17e26c221db1947783a530714f7feea78f6f039b29bd6c5f233d6ceaf18be45b