Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa3c206440a349c…

MALICIOUS

PDF

69.6 KB Created: 2021-09-27 03:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c7fb157659960d922ab32c94278838fa SHA-1: 89c7afee302704cdece8d28c19bb28cc5889eb31 SHA-256: faa3c206440a349ca5b89b021b3876d19faa97e6395b5f003d638edf30830a06
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure with an image-only design and a clickable action. Heuristics indicate it functions as a link farm on disposable hosting, directing users to various external URLs. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://infrive.ru/uplcv?utm_term=watch+the+glass+castle+movie+online+free PDF link annotation
    • http://maskaevlawyer.ru/userfiles/file/litigegunel.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/933b57e59ccf0dcf93d0418594bb7adc/93289528896.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/76882175764.pdfIn PDF document text
    • http://artio.pl/files/files/miposiripivabegufufi.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/88670055232.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/98106814117.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/2238305438.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/gukuwo.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/pinemofulakadujirow.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210907145230.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/31265763397.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/22/mugepemewobasatetafovab.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/99266817337.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/26118410.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/60574888831.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/60271955158.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210910_152713.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16143d8f8013b0---21202573233.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/lenamosixumija.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/wapiwexe.pdfIn PDF document text
    • http://vollaracis.com/UserFiles/file/69440013766.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/judexirowixivaba.pdfIn PDF document text
    • https://hobbypet.cz/files/file/16609959654.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/87620837484.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/48643534828.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_off0000b201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB201 14264 bytes
SHA-256: 0d13880f88af19ba8d57a5f5076746e364eb23ef48ff1d2f8c6266e12be900b5
font_01_sfnt_off0000d54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 10844 bytes
SHA-256: dd0f721ddf25a4961f5b2e9bdbf04a247309610b812d071992cf69341c1e951b