Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c29ba501b64d854…

MALICIOUS

PDF

71.9 KB Created: 2021-09-04 01:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 87a6b3adec041522ba57a9c13a838bbb SHA-1: 42521d71bd21b2fdedd2e6d21be281815b1b1a82 SHA-256: 2c29ba501b64d85413a3b70c0d873ad6536bf798e5e1167338cb7bba53b11487
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sudhirsachdevaclasses.com/ci/userfiles/files/padowazifubudonal.pdf In PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d4e0500f8---5974006434.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/66089888159.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/30325629303.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/sabepigijebuwulizez.pdfIn PDF document text
    • https://tavio.ru/files/file/wowaxagurimopoge.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b83255659---nisepevufokebabu.pdfIn PDF document text
    • http://vejwun.cz/images/mujerugiwaxufagodadujobe.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/r7nmdensd0ko3qglek8fatpgu0/tarutidajorekaribedu.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210622_3116BBFFECC4402F.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/dfb314f3d8b90ea4ac3ab0379209acc6/retiwafisuzo.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f30ae57993---febadufipom.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/pefosarube.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/kosikunazadeto.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae92de5bf6---23875632145.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/161240a16aa768---93259908534.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c46a99ce959---nekulogokowenik.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/97475707199.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/nazufujozofikepebome.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cfa2aaa29---rokumitegamas.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/divonigifemegival.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/tivix.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/geduwofetirusepiwonavepu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160884f33eee6d---73807975540.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/fe069ae8f4d676ead210c9accfa11f60/fatubaligivi.pdfIn PDF document text
    • http://allasclub.com/campannas/file/63827633105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=atys+g+manualPDF 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_off0000b93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93F 15996 bytes
SHA-256: b723679527a9ae8755e187e16905b44ff403516bc433efd37286d86ee283f25d
font_01_sfnt_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 10204 bytes
SHA-256: c914fb216a5af4dcd827902e6a8a160ffb3fa9f10cbfc47ff59db94f40e4f9f5

Open this report in the interactive analyzer, or submit your own file for analysis.