Malicious PDF — malware analysis report

Static analysis result for SHA-256 22046e05c60d1ca7…

MALICIOUS

PDF

81.1 KB Created: 2021-09-13 08:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 61168b804fc009960b8840d026c5d810 SHA-1: 6daaa81351d39763ca5cf47e39742d9ab69a34c9 SHA-256: 22046e05c60d1ca7da6da559b3d7fe412240dda13818e590eb7e7d39c7c8db19
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with one identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gastrotest.co/ckfinder/userfiles/files/59928084163.pdf In PDF document text
    • https://virtualpulse.eu/UserFiles/file/wemejobukex.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/jekowizirof.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/woxipezawegawufajamofone.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc274a70ad---70797192072.pdfIn PDF document text
    • https://papiratisk.cz/soubory/zinolemamumabolapevu.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/fufemitutigapinani.pdfIn PDF document text
    • https://htchninc.com/d/files/nonubafa.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/17566724076.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/88707541861.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/46003349283.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/14797496663.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/wajavovabebelogolisisobis.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/voritizuno.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/94853730644.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/mumegosovaz.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/8a42d786e1a1b1dbc7efd0c9041a6a31/34460146100.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///levaxamipobitevitideb.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/subof.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/fuzozotivasaxev.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/15656967584.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/xiwobuvejevibu.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/84779906949.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/86541017943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=vola+sports+firestick+updatePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65B 10668 bytes
SHA-256: 37eeb36fd051fc1d138a7cabc6800b82cd1209d08ab6109e3cbd63ba7a4603e8
font_01_sfnt_off0000eefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 18700 bytes
SHA-256: 583a5e0840f7c0597b1034510ee96480941a0931017547990ca73d18294c7e8e

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