Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a31791fcc2d20e…

MALICIOUS

PDF

72.3 KB Created: 2021-09-19 15:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1fdc235032a3a7c64d3d61e0d8c70c9b SHA-1: fb2c974c080ffa223f4239ab7919bef24cbe55ab SHA-256: d2a31791fcc2d20e69048fc282ea3a64bdadb4adbee4e89661f5a9b59c483615
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV heuristic identifies it as a phishing trojan. The presence of external URIs and the link farm nature suggest the primary goal is to redirect users to malicious sites, likely for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4393

Heuristics 4

  • 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
  • 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://philabc.ru/uplcv?utm_term=king+of+fighters+99+free+download+for+android PDF link annotation
    • https://kangaroovietuc.vn/webroot/img/files/rukitobafo.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/22498450033.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/mewodexipipofibagubimipet.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a4ca58755---fopanidelitikozetiwufo.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/waxugug.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/bolabisolefiko.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/gotekil.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/xipagiku.pdfIn PDF document text
    • http://korytnica.net/data/files/xukijajenokojojimisu.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/sagabe.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/28659349974.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/liwob.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/36919133706.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/tabiloni.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/44643899914.pdfIn PDF document text
    • https://beautydent.hu/editor_up/wuzofupej.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/legelejubenawetalaj.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f078c6a304---64794861586.pdfIn PDF document text
    • http://boldogelet.hu/media/volaxufejowila.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/gepurafiw.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/zekufeluxagolasowurufem.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59957500762.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/doxowopuwonuton.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/pekefipifexexu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 10880 bytes
SHA-256: 1668fce071aad5f44207f22ce0ef5dac466ec29f7327dd1c29795b02d076f205

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