Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02a1a4d05c028d2…

MALICIOUS

PDF

84.1 KB Created: 2021-09-08 13:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 037946be348afe5bd43f1f17601f1c5a SHA-1: 1927a2b681f09fced6990431b3d1b6f909bd924d SHA-256: e02a1a4d05c028d276e866b02e672df116464dcc52ffa91fa84cbf2757947714
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, many of which point to link farms hosted on potentially compromised or disposable domains. The PDF structure and embedded URLs suggest a phishing or malware distribution lure, likely intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=definition+of+ethnocentrism+pdf PDF link annotation
    • https://uleshuzataruhaz.hu/files/file/69201847124.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/69237003388.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/murigol.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/xisafesaruvofitew.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/68569164785.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381d87a1649---79960371048.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/31855704609.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/tiwizetilira.pdfIn PDF document text
    • http://schokofontaenen.de/idata/7175367561.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/64226618105.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16130d069b6b67---99374674113.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/64093732690.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/0980aee86428e7c841c890b2211b3519/sunuseroverowof.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/161374805a568d---letajudatiwapapobon.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/fodusepimibofijokuzozokag.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/48974036488.pdfIn PDF document text
    • http://kes.org/upload/editor/files/zaxurewo.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/zepob.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/simutof.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/82095126520.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/gubulonof.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/72963317463.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_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 18320 bytes
SHA-256: 6b9677efe7d210f18e94b6eb8127613af23bdf15e501fea8e0cebd2ef79aef87
font_01_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 10680 bytes
SHA-256: 39a2dc3c8215b87576aa8fc77b215492e24aa043d995ff19fcfb75355c27f7b5
font_02_sfnt_off00012a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1