Malicious PDF — malware analysis report

Static analysis result for SHA-256 06564da7ddb1ff93…

MALICIOUS

PDF

74.4 KB Created: 2021-09-17 07:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a15bd033dfb190b144d20d3aef15820a SHA-1: f809c95f8718e52c7a2517a6f807dcbc109082cf SHA-256: 06564da7ddb1ff93d7a570e2cdc25ab5ce15496933b5565259ad3cfdd3eae6d6
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, one of which is a direct link to a file download with a query parameter suggesting a game. Heuristics indicate the PDF is a link farm and potentially a phishing lure, with a high ML score and ClamAV detection confirming maliciousness. The document's purpose appears to be tricking users into downloading malware disguised as a game.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=gta+5+lite+apk PDF link annotation
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/logofasij.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/99130127815.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/92945077386.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/53974788935.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/basoze.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/25736779330.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/nebexotagirasisekunevo.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/pisapakudukusibanenusapog.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/nirulimekusosuviwemerosut.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/73207919841.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/vezafogoma.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/77146419335.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/nirubeduduwufubixojanizi.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/sikarutagixebunupixevowef.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/17236724525.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/lorewuza.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/37931771142.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/27897690027.pdfIn PDF document text
    • http://short-story.ru/upload/file/rapekat.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/fofifejulemududonigefisi.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/19359767745.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/77782475000.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/62885465385.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021090107472615.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_off0000c1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F9 10016 bytes
SHA-256: da6aa024341a8738385dfb9c537fd867124e5a3b048bebb822f4fb1a874c12b5
font_02_sfnt_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 17008 bytes
SHA-256: fc47d28f82693fc017944e93e6045270e73ea04b4673b7a69aabde69f4a69ce9

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