Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f0747dabdaa0fe…

MALICIOUS

PDF

83.5 KB Created: 2021-09-13 08:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 05949e76a0b597b75fc3664f7ff8077a SHA-1: c21d6684d2d8ae7955037d0b1f82e76d66e56012 SHA-256: 80f0747dabdaa0fef2f2e432af30de808c46d36471327f73135d66c9102aa380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs and links pointing to potentially compromised or disposable hosting. The presence of these links suggests an attempt to lure users to external sites, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ketchas.ru/uplcv?utm_term=firestick+spanish+channels PDF link annotation
    • http://zavalinka.by/var/upload/file/genozojax.pdfIn PDF document text
    • https://equinox-e.com/upload/files/fumumofasizelitoz.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/3445275647.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/wiwonujor.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/baxafoda.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/bonuvabuwugujo.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/pabivuzifi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/81716356122.pdfIn PDF document text
    • http://vce34.ru/attachments/file/doziduvute.pdfIn PDF document text
    • https://ever-progress.com/upload/files/65615034458.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/sidetujerezezetokela.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161312bdaeec70---duvigonozideti.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/33291169133.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/61452018108.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/wosafojujazopozawawuloxe.pdfIn PDF document text
    • http://htwy.com/upload/file/69818949414.pdfIn PDF document text
    • http://schubert-hh.de/image/file/jisapagemezinavonis.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613662ab5cfab---13693696764.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/10746514683.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/30355369466.pdfIn PDF document text
    • http://telecycling.info/files/file/46533849664.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/mukegemubapejisiwumenuza.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/09e861052f2f7c69ada3b5a7fe5d6297/74827084250.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_off0000dc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 19668 bytes
SHA-256: b3e6d82ed3bb78652dcd5a524042bc0c3e105ed1946a0eb4542ef6fbb2aa488a
font_02_sfnt_off000128b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B2 10420 bytes
SHA-256: 5ae90a03ed6f0625172c87ab844d718856f3eff4be5775e6441f926bb6f4e564