Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64865fbb9f19c3a…

MALICIOUS

PDF

99.3 KB Created: 2021-09-05 23:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 466979373a27e71b073a773ff454915d SHA-1: 033f90a8a40fbef9eaae919f7024a068fe78d444 SHA-256: a64865fbb9f19c3a55a2e80d594a99a33fddd952f408ebd222a93394e291d37d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm for SEO poisoning or phishing. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://oniceh.ru/uplcv?utm_term=chrysler+sebring+2007+owners+manual PDF link annotation
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611993aa86592---tefedowimupawuvile.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/734mg7isskbe3tmsn2bv4isls1/79565870333.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/59452283831.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/lixogofelukaliwimikosib.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/wipesobilidodilitu.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e1d937b56---guvatibobibuleparimala.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/mamubefen.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/9ln7cuvlkuiduflrb4olbpu9g1/4437968486.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/92889221249.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/e7088a4a4b2afab0ef1fadaaaac7b098/wozix.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/12294564715.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/6781441264.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/5v60hft5corui98k00affp25h0/rufubuvumuledutavofa.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c95c9f4c4ef---38366766062.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/37673414815.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/sabexitozaru.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/ab662565379f6ad7994a9b68fc688ec9/38890629455.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/14779254214.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/nodimekizomukomojosodaxil.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/19464326172.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/rugujapabebevozobebutajix.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/397fva1hmdsvhjm9d6afq49jom/35106188535.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210823154710.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/80758724823.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be167004910---mukake.pdfIn PDF document text
    • 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_off00011c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C95 11220 bytes
SHA-256: d7a1bb8c0ddfce49059cab58c5735b770a3fbd3c6d5e711f0c9f730675e0a396
font_01_sfnt_off000136d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE8 18220 bytes
SHA-256: c80f84d2afbe07b860683c3d6f471868b8aae9011681fda0a72e12facca8b222

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