Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7a3c401f8cb7a4…

MALICIOUS

PDF

69.1 KB Created: 2021-09-24 05:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4c88655517afcfb1915540223817e440 SHA-1: 641522dadfa1ff12d43c9d4a8a2594de9aed1c6e SHA-256: ab7a3c401f8cb7a47f66b8f140b5d5e869dd0126b5cebae779d8102b0df56ff5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=iphone+font+for+android+download PDF link annotation
    • https://branpc.in/ckfinder/userfiles/files/jevadafidewesaxumim.pdfIn PDF document text
    • https://termoformat.md/img/files/lepizatixapafa.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/49973220787.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/xudikipiduvu.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/32666546418.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/36364996320.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/xevibamok.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/sipasezu.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/2557783915.pdfIn PDF document text
    • http://temple.mo/userfiles/file/16653536554.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/30387932270.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/mumuwirivajafasiri.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/pegew.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/tonodadoju.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/xaduwusodewawarajamap.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/78804458147.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/kivetalutasibigitamiveb.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ae086eed1---tafafiwavinirojid.pdfIn PDF document text
    • http://midoriku.zaitakunet.jp/app/webroot/upload_images/files/xuxam.pdfIn PDF document text
    • http://poliinc.com/upload/files/56848476966.pdfIn PDF document text
    • http://pelejas.com/IMAGENS/CKFINDER/files/kevulujiwobu.pdfIn PDF document text
    • http://att-na.com/upload/36731635997.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d19a1420ea---55625948206.pdfIn PDF document text
    • http://strandedtattoo.com/file/ruwaji.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_off0000b2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E9 14364 bytes
SHA-256: 283954ff88aeb900aa354f88c9d0a025d0213161b3560fa305167b2b45173a92
font_01_sfnt_off0000d6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A3 10464 bytes
SHA-256: 6dc0bfee1e2e23353b6ae5ea0fa140c13a2f4de2d05cdb1c2b4fb93fbeb47bc0
font_02_sfnt_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.