Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f97d0118243e465…

MALICIOUS

PDF

78.5 KB Created: 2021-09-10 11:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 80bf176db32936b563669d71e56409b8 SHA-1: cf7a1be1fa78b20f8d7f7da035afddba5d0524fc SHA-256: 2f97d0118243e465c9d0562ff0dd5f4ea584396f9da81311317d0351943e0a4f
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is described as a link farm. This suggests the primary goal is to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://modern-pro.ru/files/file/70744149693.pdf In PDF document text
    • http://mcap.cz/images/uploadedimages/file/vipopobapudoxe.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/wulevikipezu.pdfIn PDF document text
    • http://bjjiffy.com/upload/56116649768.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/ganesesufaxizosito.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/jemosometoxudud.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/41715219403.pdfIn PDF document text
    • http://carbonelite.ru/file/79122476779.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/pepodoporuwer.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/9506057564.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/kavuvaredugunapuzenibogu.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/45878694703.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/nuvigemuzuzazaduxibe.pdfIn PDF document text
    • http://billsky.ee/files/file/kogolitafabowonagevedo.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/tavivebeperari.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/11839583776.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/puluvuroxota.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/68451311833.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/68851659576.pdfIn PDF document text
    • http://paliukenas.lt/i/File/kugevalag.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/filejemeri.pdfIn PDF document text
    • http://hengfengpaper.com/filespath/files/20210906075458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=effective+nuclear+charge+and+atomic+radiusPDF 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_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 17476 bytes
SHA-256: 616aafb0c2d6ec56f33a9fc0a0416ba3be0e1d6a1c6a55ef50a83f0fd3dbd1a3
font_01_sfnt_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 11072 bytes
SHA-256: ca355f982671986ec760dabbbddd8a8b25b9d25bafce2e6048041c6fb5e5be4f
font_02_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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