Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76d4ad111ac3df5…

MALICIOUS

PDF

77.0 KB Created: 2021-08-03 19:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 184144a1ebd858375b140ca33a6f57b5 SHA-1: 7406c9c72ed2b25422ea62954aa61d4a58af3671 SHA-256: d76d4ad111ac3df52b61e756e0bef3b1bd259e1ca4ff1c7a620f70fd2f7b2388
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the conclusion that this document is designed to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cructi.ru/uplcv?utm_term=avery+weigh+tronix+wi-125+calibration+manual PDF link annotation
    • http://xn--80an2aej.xn--p1ai/up/file/fazuk.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19cb409365---20743676510.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/37761883717.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/0aef76464e781b8451fcd960a3f063a1/15570222021.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/60877364610.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0f9046f3c---xinotebuzafipuxavawulo.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/nabage.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb8a0becf---73852097152.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087ffad7b292---98785698125.pdfIn PDF document text
    • https://landi-bg.com/images/file/sajixuxidojurekijeto.pdfIn PDF document text
    • http://flexa.cz/docs/file/nusogoki.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/genexigegulibakisi.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/nudumaretewitemejo.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/88993537606.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/34562cacee32b5b1f0f4819eb48fe3ca/30248029781.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/umirhfvlr9m3sufbmdpjrka65t/237528092.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/10b58a0cfa6a12d495df750d7f15a9e3/70692896650.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/kcv80o0bsop1piuck3ho5tc1fa/zinetuwuvubixuputi.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/61018806562.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/72604127904.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/62320858326.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/6074ed38c3612fee5aa376f4c59b2256/loxadidida.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/47123011084.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/4jt18h7opl7luhpfu5srms2gvl/tonuludominagowoxa.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/93009146824.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_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 16876 bytes
SHA-256: c3fe566f8cf797490f78053534652286082b6772441b0dd6a599859c731eb39b
font_02_sfnt_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 11436 bytes
SHA-256: fc3dc64dd5386794a9061406eec4ef159b948447e73ec849ce5c597fff5acf6d

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