Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d37924d990110ef…

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 17:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 12ce21c17f66285b8927bad24cd12061 SHA-1: cc989f3dc49119cbf71383c7ce3da0fe6d8de9b4 SHA-256: 0d37924d990110ef6d50c2f12bd614fba82b661924afddbf0e7f8518e83e3220
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating it's a link farm on disposable hosting and includes a lure to execute commands via the clipboard. The embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://allytemp.ru/uplcv?utm_term=recover+deleted+call+log+android PDF link annotation
    • https://aecvfcom.nrgence.com/upload/userfiles/files/7747471220.pdfIn PDF document text
    • http://atanasijornet.net/uploads/ckfinder/files/vepogamujotetobepivudikeb.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130cdc8b18e1---89823379669.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/67428132700.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/dujowuvesagifoxetipa.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/luruzegemudukuxe.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/96562457644.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/xiroto.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/10800046896.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/37048956546.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/fubapuxabotusanujuw.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/konepozisilavuzuf.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/17331943154.pdfIn PDF document text
    • http://cwesp.biz/upload/file/78886796710.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/denumakujizivevakukerubo.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/pareduzolumi.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/lolofozatijuzumajuvogu.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/53278302710.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/96707098011.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/negatibubunokuvufexovusi.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF756 18720 bytes
SHA-256: 44f8750d0953aac1efdd746b1b14df61acd4fc005728fc2a38743bccd275704f
font_02_sfnt_off00012802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12802 10488 bytes
SHA-256: bdc18ef88f430f9181f33b179bd9bf2c87c0d0c996173f92ed24841644eaddc0

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