Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00456757af553ef…

MALICIOUS

PDF

75.0 KB Created: 2021-09-10 23:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52a1630f1e2684bfcdc34454b5503a4f SHA-1: bb0e4824023e0aefee902e72917f79a1b4eaa0ca SHA-256: d00456757af553ef54b25688bffc90253e44b5ca91ebe487d297e200d1c2c968
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many of which are linked to disposable hosting and appear to be part of a link farm, suggests a phishing or malware distribution scheme. The primary URL, 'https://smidgel.ru/uplcv?utm_term=forza+horizon+4+android+obb+file+download', indicates a lure related to game downloads, likely to trick users into downloading a payload.

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://smidgel.ru/uplcv?utm_term=forza+horizon+4+android+obb+file+download PDF link annotation
    • http://longruiglass.com/ckfinder/userfiles/files/20210903_062143.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/mevozerexodarazofovadif.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/29453565467.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/60056225345.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/36147433161.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/resimajovazakabaso.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/26461996619.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/welibo.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/61451037858.pdfIn PDF document text
    • http://aurora-c.jp/files/files/lotijigatibijilemidufete.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/92060614583.pdfIn PDF document text
    • http://ativn.com/upload/file/begipavuvijome.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/gewufoze.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/433276501.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/15701701396.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/wofixesakelinuluzujezi.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/23112664564.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/fopibibin.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/91383637563.pdfIn PDF document text
    • http://moscowballet.ru/userfiles/file/42134347070.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/41551452657.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e68850d68---niwodinapurudorajofadoje.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/xosenasudi.pdfIn PDF document text
    • http://npas.ru/pic/file/19215134137.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/12446479979.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_off0000c2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000daff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 16864 bytes
SHA-256: c93d77eada8b1849de3016fe6ec520019229fa0fa9e1ab5e3c1d1f5b7b24a705
font_02_sfnt_off0001065a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065A 10524 bytes
SHA-256: 11ab9583a4a3934829564b4845581448dc1e1a326f77c6710100d24650f66b05

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