Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94edc51150037f7…

MALICIOUS

PDF

76.8 KB Created: 2021-09-18 12:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ec4a8c29b65e279dae51f8541b586e34 SHA-1: 9e8f2097e1e9fca9c40cc07057184a13e4e3708e SHA-256: e94edc51150037f745f94051f4903e57f5a22277848ab66e55003102b16b36e2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users to potentially harmful sites.

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://allytemp.ru/uplcv?utm_term=what+happens+if+i+reset+my+phone+to+factory+settings PDF link annotation
    • http://ttccid.com/userfiles/file/wogorolaz.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210912125108.pdfIn PDF document text
    • https://matrixx.lu/images/70019921547.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210902_FA5C748E96D0FAEB.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/dasukijuxodiwom.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130217f406e5---94918790581.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/54712647134.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/9500087673.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/15798093075.pdfIn PDF document text
    • http://195exim.com/datas/files/89176985290.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/5273701533.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/xusedukokivawazesunefip.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/95420442287.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021090316295073499.pdfIn PDF document text
    • https://etimes.mn/uploads/files/favoxa.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/xizoxabovivaz.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/xetowewekuxexap.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/3l8hscgda7ikh6l9e4erpqu7s4/52578879903.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/57666707794.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/18354724930.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/11577365187.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/21895240158.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/7492572652.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/10669466302.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_off0000c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC813 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE025 16764 bytes
SHA-256: edded852af39fe685f28636317845f4d46dbcaef200dfb660769b68ee93bf1d5
font_02_sfnt_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 10988 bytes
SHA-256: c910fa9dbe6004f83c72104b85e7a87a94b39e205ddd6df9ced14902d909f1f3