Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d9746b5edc2bca…

MALICIOUS

PDF

69.4 KB Created: 2021-09-11 02:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dbb773f0151f98684b6dfd5c1fa71883 SHA-1: f32d907e17e6f45c854eb3d3ce1e99d1389f75c1 SHA-256: f3d9746b5edc2bca3094f04eec385e9675d9e1991db7786272407fbd154e7fec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links to other potentially malicious files, aiming to obscure the true malicious intent. The embedded URLs, while some are marked benign, point to a pattern of distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 http://agilesolutions.in/uploads/75866167200.pdf In PDF document text
    • http://hospitalityroyal.com/upload_files/file/34456952882.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/gigokavunama.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/65409795785.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/difidulekewixo.pdfIn PDF document text
    • http://effektfilm.de/files/file/85200750664.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d4b27e3ab---74454664715.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/janut.pdfIn PDF document text
    • https://zahrek.com/userfiles/file/wirosikosadapog.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a76408d778---32121426567.pdfIn PDF document text
    • http://computerdoki.hu/user/file/rizadifujevutal.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109021954214848.pdfIn PDF document text
    • https://cargotavio.ru/files/file/lowuj.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/58636998511.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/deluseninigukut.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/mozufudatavipuwik.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/vimovum.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/pomakexozosu.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/numefemenetifusuvomawut.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/17034677663.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/zulazozazaba.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/poxakebidijili.pdfIn PDF document text
    • https://andana.us/files/files/83819489371.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210903031207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pokemon+tcg+online+apk+latest+versionPDF link annotation
    • 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_off0000af01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC713 15072 bytes
SHA-256: f8dcb3860c4ca43940d5239134c10f7a52c708e83d8852cfd3327de9cfeddd26
font_02_sfnt_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 10876 bytes
SHA-256: 86e0e8d4dd615cefbf0859c5b03cf43445ed3a42382598b347bce6a1ac267b6a

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