Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22dd166b22774bc…

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 21:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fe60c4b5f2a203790e7417909f9fa1b8 SHA-1: cd3783c2e239a81832a628542f5451a665953f76 SHA-256: e22dd166b22774bcdc7a426e550849f3a952dc9424153ae418be510db1509ecb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful sites. The presence of embedded URLs and the nature of the heuristics suggest this document is designed to facilitate initial access through social engineering, likely leading to further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=how+to+transfer+photos+to+macbook+from+android PDF link annotation
    • http://elitvorota.ru/f/file/76458655178.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140f54c51214---puxubabaxulok.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/nonufugabuzalagagodepi.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/82573669893.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/nebogununupetoma.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210908101811.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/33569325832.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/petaromagufuvagovedipim.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/62495173968.pdfIn PDF document text
    • http://vina2002.com/uploads/files/vimujerejadurewanuxenupi.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/buwumakixomupefajar.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/ropatupanumexemudoxus.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a0033d1aa---94748644591.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109171826369645.pdfIn PDF document text
    • http://rjt1.org/upload/files/numoparamojabit.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/41766381343.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/17295332174.pdfIn PDF document text
    • https://fasleh.net/Files/files/25121486461.pdfIn PDF document text
    • https://lorus.rs/files/88756144546.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/93179174490.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/xajibubokarefovaxofip.pdfIn PDF document text
    • http://npi-management.fr/ressource/site-image/files/54669383569.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/josovotozuwezoxudi.pdfIn PDF document text
    • http://enkepharma.com/upload/files/duporaxame.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_off0000b275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB275 11148 bytes
SHA-256: 4e6d9c981defc29902b6c3e925ee48599ec53e0ca2a07ea4ae912b4b057960d0
font_01_sfnt_off0000cc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 15116 bytes
SHA-256: 0d9dd7bcacb24695daa831e3e4ec915a7d3775430d9d90e3a9219ff4a17a5db4
font_02_sfnt_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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