Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7feaba966dd8ec8…

MALICIOUS

PDF

82.8 KB Created: 2021-09-11 01:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7fc471639a76cf282fb24bd644b743d8 SHA-1: 11efeeaba7ce694276c27e86a3e3c4ba72bee33d SHA-256: e7feaba966dd8ec82cce87f788d683138158ab26a62e1ce963b93521b74353f6
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. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=how+to+set+any+song+as+ringtone+on+android PDF link annotation
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/gexenareja.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zixado.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/livajokosurobasade.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/16912300203.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/rurunuvukugi.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/nifagizekijazixuxuz.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/23033817303.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/titimanapepogewoxekupopa.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/getizupaninela.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/94765897937.pdfIn PDF document text
    • http://allier-genealogie.org/File:/nokufamuv.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/83889555160.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/rebosezavuwepokatetur.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/kaxob.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/balelewavekitoxokigozibaz.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/30622470939.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/51321107813.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/58694183326.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/73879022842.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613108743d3af---tatobas.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/60840471707.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/redap.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/47019632386.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_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 17284 bytes
SHA-256: 8c3e2326ef5b544584641087029bb49c9a3196ece7d8cb969c28776c921b073b
font_01_sfnt_off00010d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D06 10568 bytes
SHA-256: 18db64c51706c7c36b9373849227750dc9893e0c97b438b103f30b4691d8f03a
font_02_sfnt_off0001251d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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