Malicious PDF — malware analysis report

Static analysis result for SHA-256 babc585867a3090b…

MALICIOUS

PDF

85.7 KB Created: 2021-09-01 01:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 77e6ea0a658b43b8f0e5499d45786834 SHA-1: df137d630233936334b95c7cdc4f627bcb3e8400 SHA-256: babc585867a3090bb555ebcf393042d06c97cd2263a231927735655d12ea9db1
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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://architettipassarinmarzotto.com/userfiles/files/jalosunikisafeluguxumival.pdf In PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/39885353285.pdfIn PDF document text
    • http://geoman.cz/data/file/93301419188.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/ferufezezamukusoginevuben.pdfIn PDF document text
    • http://domainecomps.com/documents/files/natazebov.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/27095595131.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080ebee31941---22767966496.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/risedojogewadepijivugopo.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/76120748579.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/seis5fqpq49l9o9acbnpmr233v/24006221212.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607361f9255e3---duzuzilijalukukopum.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ecbfa1d91eced45430b741a63529f0ab/14503400433.pdfIn PDF document text
    • http://pvvc.cz/files/2620694433.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/8552jjs4innt6bpqi3jbsp6r1v/76671802688.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609540988d362---liwuwolumetofuxarujosizix.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/2283643683.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/50193234179.pdfIn PDF document text
    • https://wita.lt/images/files/63750407624.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/1afmp2vvlh6mi6kfggh3i67vgm/jujedur.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/58042332766.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/910af71838a459080031ec25c1eb1310/dijudafavojedalefukagus.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/2d98ea3f111637d17fdd04f1ae012c93/gojaniraxopurivenok.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/nanepofajexepofuv.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/74a3a9f490274a3a328ac28647c12285/juxovatagizetit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cutting+back+roses+in+summerPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 18460 bytes
SHA-256: 493d7e219af73717d0cbf614a7ff2d4baa3b84e96a3c110fd457bd0c28c38300
font_01_sfnt_off00011700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11700 10888 bytes
SHA-256: e9093778e608947744fe3b7f1481ac38d9b7c389b3d091c339faa6aa696a4ed9
font_02_sfnt_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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