Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6011f9dec45162f…

MALICIOUS

PDF

77.0 KB Created: 2021-10-02 16:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d80db65644b601dccfb048382dfdcc4 SHA-1: 6c4d8985bff536fbe84900c86dc80e2ad0c78098 SHA-256: a6011f9dec45162fc7f211734ada5bdfca2929225b4eb5972bf4e0dae99b61c3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to suspicious domains, consistent with phishing or link farm activity. The PDF structure and embedded content suggest it's intended to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://infrive.ru/uplcv?utm_term=green+eyes+chords+acoustic
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/noxevigaj.pdf
    • https://easternresources.net/ckfinder/userfiles/files/fugawu.pdf
    • https://comptables-publics.fr/userfiles/file/71160109242.pdf
    • http://fernandopelosini.it/userfiles/files/79950159294.pdf
    • http://mn-print.ru/ckfinder/userfiles/files/47392655620.pdf
    • http://mastervin.ru/files/file/nazakifigix.pdf
    • http://teusz.pl/UserFiles/file/56753667798.pdf
    • http://stluciachamber.org/uploadedImages/contentImg/file/17204863264.pdf
    • http://kirakuramenandsushi.com/uploads/files/vomuderegozajavunejata.pdf
    • http://knuhpharm.kr/userfiles/file/20211001215304.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/01d4d1fd6c165fe0bb066a9331aee998/25596179804.pdf
    • http://abbwingslynnhaven.com/uploads/files/39083433012.pdf
    • http://cafecontinentalmd.com/uploads/files/39370949602.pdf
    • http://amphorabeautyclub.com/campannas/file/79297743739.pdf
    • http://sdtr.mdrap.ro/fckeditor/uploads/file/rojumijanapuv.pdf
    • https://buddhaart.in/userfiles/file/jixekelanuzelisaki.pdf
    • http://ueros.fr/admin/ckfinder/userfiles/files/zutopamibatejuvotifufo.pdf
    • http://babyindex.nl/images/uploads/wusutugotodenazanovozos.pdf
    • http://curvesncontours.com/userfiles/file/65472306.pdf
    • http://2990592.ru/ckfinder/userfiles/files/82784845258.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614eea18ef0f8---lamizadumefamo.pdf
    • http://xahscw.com/userfiles/file/xagilopusi.pdf
    • http://dejonghenico.be/sites/default/files/file/givefojamat.pdf
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/36591816065.pdf
    • 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_off0000bdf1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF1 16792 bytes
font_01_sfnt_off0000d608.bin
ed3392431bcb7206f84326eef234b5067181134c7e4c7316fc6a936009676673		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 10676 bytes
font_02_sfnt_off0000ee81.bin
dc0207f87f58dd30ba010f860a574ea2cc8c5bd6eb250bddae19c827532a2121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 20468 bytes

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