Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2044f3f75ad88e…

MALICIOUS

PDF

79.8 KB Created: 2021-09-14 00:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 63c5dbc323cef9cda2c4916cd091b91f SHA-1: ccc5c5d2f0315ee2f1a8701e8f1153b2e0051735 SHA-256: 7d2044f3f75ad88e9a486b53c5ed9001421b48654e8e973370f0323957182de2
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. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites.

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 http://avon-bratislava.sk/files/files/gilob.pdf In PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/12423393289.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/77605901658.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/kofevejulagitanewofunoxi.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/94797804713.pdfIn PDF document text
    • http://diagcorlifescience.com/attachment/file/31010984695.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/12782834208.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/15157935413.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/sirogilifipomumifiziva.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/40667634701.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/xitapaze.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/aa0d97bcd56bc843cb241866863f9394/23938042799.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/37818994025.pdfIn PDF document text
    • http://workontext.ru/media/file/18767664606.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/67829367695.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/14748749458.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/13130277152.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/getekizutalarowejov.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/zizobutobes.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/xawamiwudujiz.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/gebarebo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1e9cd9f24---famivegexanolutuwofekuj.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/digetofelevidopeledowur.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/17940534963.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/zezikotalol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=view+recycle+bin+androidPDF 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_off0000d401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD401 17576 bytes
SHA-256: d1b280ba5a44294ffa8c1fabebfea262552a4f4c6def1fa98c0ec4999733cc19
font_01_sfnt_off000101da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 10404 bytes
SHA-256: e6ce3d77dfdf16d2c9e17fff6cfb743cc56321bfe3700089cad001e9729741a0
font_02_sfnt_off00011986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1