Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dabce7060a2d40…

MALICIOUS

PDF

74.8 KB Created: 2021-09-14 03:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0aea13491ee15c56c7c244670c78a613 SHA-1: 549fdafeaee46323eea24d69455cb643d475da7c SHA-256: 74dabce7060a2d408441e11212f9e231f2d77a52abf532f031b9fd7f270df60a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, containing numerous external URIs pointing to various domains, likely to host malicious content or facilitate phishing. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://mlsconsulting.net/cms/files/File/wibifusirenuni.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161314b80b65d9---vegukuzovim.pdf
    • https://dnmpaint.com/sdcc/images/file/faxedofavijuxo.pdf
    • http://peter-scherer.de/userfiles/file/dotupukasafaletedudini.pdf
    • http://champagne-marc-chauvet.com/images/files/badulenalu.pdf
    • http://scoutpate.com/userfiles/file/nakobipufuwupa.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c1ef819558bba0205b070c1b187f5be5/76691334096.pdf
    • http://cosmik-kinoteatr.ru/sadm_files/63890218081.pdf
    • http://krakow4you.pl/krakow/files/33769426585.pdf
    • http://cuspsurgeons.com/userfiles/file/rejofafixevub.pdf
    • https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/46733455278.pdf
    • https://self-storage.sg/images/uploadedimages/file/74911555336.pdf
    • https://onlinendttraining.net/files/78565774597.pdf
    • http://ortopediaszombathely.hu/editor_up/sitetigunetuvofomisok.pdf
    • http://steakclubhn.com/campannas/file/tozekugoje.pdf
    • https://tempegaring.com/contents/files/15757899482.pdf
    • http://budoprojekt.eu/obrazy/file/83269574661.pdf
    • http://cecev.com/stockages/files/buzonomitexu.pdf
    • http://ch-bovi.com/upload/files/gijafuwowuratepevujotoki.pdf
    • https://optimustelecoms.com/ckfinder/userfiles/files/33908800791.pdf
    • http://katour.ru/admin/ckfinder/userfiles/files/66649836657.pdf
    • http://inarchengineering.it/userfiles/files/jekoduwizovadulitaz.pdf
    • https://valve-toho.com/userfiles/file/sigabutibi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=android+tv+free+channels+app
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2e9.bin
c9e33bd5a630ae1ef1162a9201f08f717560623af0aff79bf3f8b0eccfe97ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E9 16308 bytes
font_01_sfnt_off0000ecdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 16792 bytes
font_02_sfnt_off000104f6.bin
2c41c1a82b1c2bf40579743dcd12ef5df4589d13516083ab51805ad48178fa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F6 10764 bytes

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