Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a2adfa5295a641…

MALICIOUS

PDF

77.8 KB Created: 2021-09-18 22:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 64f313f3fd5def384a9305a7b2d3b685 SHA-1: d93d85e8562a8b03737616cf41da53a9aac20e3a SHA-256: a2a2adfa5295a641b06dad1333c672ec6b8f08f0bd738092aef6b577bdc475db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of 'utm_term' parameters suggests a link farm intended for SEO manipulation or directing users to malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://drafthe.ru/uplcv?utm_term=english+grammar+in+use+pdf+book PDF link annotation
    • https://ibshospitals.com/userfiles/file/tijijovogupudiwupirifofi.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/jakugixujuvefuxujizuzav.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/xukojinuforituzowex.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/gofikikigedamariviwizedun.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/21670948368.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b925982232---83461624474.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/7t7o0dtg9ivv473ulg034tot7q/22250466067.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/rozogurewulawezi.pdfIn PDF document text
    • http://holzweiss.at/85103369760.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/85429386646.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/dazute.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/23603008312.pdfIn PDF document text
    • https://davaocarrental.com/images/file/99272683724.pdfIn PDF document text
    • http://fittbikese.hu/files/file/29505829521.pdfIn PDF document text
    • http://snft.ro/media/file/fixotizenobili.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/24218274768.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/97397238685.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/30050909092.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/dapidaruri.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/zumosivovumobenexosumo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2ac4d2d71---97219847252.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/setejawo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130738115176---bagokufew.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB387 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_01_sfnt_off0000c971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC971 18820 bytes
SHA-256: 5e1f677a1f2a7c3f2ea591f580086c516366149142bbcae14f752c306ef6123b
font_02_sfnt_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 11164 bytes
SHA-256: 00b6bbbd50d071245a7ce67c2be65a147d9006e012e85e91317c4b39073dfcaa

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