Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f6ea52f4591bfb…

MALICIOUS

PDF

79.2 KB Created: 2021-09-11 23:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4f20e0c213ef4d28724c9ca173c57cef SHA-1: a33d32c32520e0e6b4c6aa25f8eea7d53c09535e SHA-256: 07f6ea52f4591bfb41caebd1add46d36d03cd6578b598d78bd8df736d14b9d07
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 numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=how+can+you+get+pokecoins+in+pokemon+go PDF link annotation
    • http://gfb.it/upload/fck/file/86150546143.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/bomizokazu.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/25435463981.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1cd2868ee---51242781356.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/lemosoditedunomaxafanowo.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/36515024790.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa25f97260---rijonudo.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/22986352137.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/wogavosulisoguvowukefu.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/66093200409.pdfIn PDF document text
    • http://banquat.com/userfiles/files/mipesesemuzevatiledina.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/69173304549.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/60321250195.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/9330371836139a4b64555a.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/xemisudemogizufikux.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109020715326603.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/bifosima.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/luboziraliz.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/bemidid.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/bexegisemuranekogoni.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/98271936047.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_off0000cfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 10956 bytes
SHA-256: f057fd379d66d1b616cdde5330d3bf89b030813840106bdf250af9b2b71de2ee
font_02_sfnt_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 17492 bytes
SHA-256: 29c2030e84821dd079321d9d7d1eba05425a6322e240fe4995974b2a1741ef49

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