Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04942e60589caf9…

MALICIOUS

PDF

75.6 KB Created: 2021-09-14 00:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c5777df6d69e12241757c9b1d9e96209 SHA-1: 1b815ba813b2aee9a9d0f3c92cf34e4b926e6101 SHA-256: f04942e60589caf9e806b38637a15cfcbe9808c4f888cff145ece9d06dcc0697
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous embedded links, many of which are designed to redirect to other PDF files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the structure and heuristic firings point towards a malicious PDF designed to trick users into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://radiosmile.hu/upload/file/wuritipimatapun.pdf In PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34221599342.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/60813363671.pdfIn PDF document text
    • https://avenue102.com/uploads/file/zinibivogojapelosisera.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/pipareg.pdfIn PDF document text
    • http://hongdacable.com/d/files/88961499561.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/potopuzuvap.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/89784010057.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b497225e3---4836387701.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/98837986025.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/29640237689.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/23481316322.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/rukizubajekimo.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/nojuzejiduxotulu.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/46514962584.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/53233805976.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/pobisewitibelidijerex.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/bilozufokegedez.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/lawawejodesawufoxajulavi.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/kupiw.pdfIn PDF document text
    • http://ropesadventure.com/d/files/gopibekanerelikovovure.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/46418623197.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/notubilufurudo.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/7455038787.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/jorufejofatazalunom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+assassin+creed+rebellion+mod+apkPDF 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_off0000c0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD916 10896 bytes
SHA-256: 1337271ffad47f699d2d6a8e64bf6a6153e10a7cb8c4d30d07d45369203067de
font_02_sfnt_off0000f216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 17708 bytes
SHA-256: ef63153e776d1a46f06f519852e1ec4a64e255caf3c4397e8cdb7d6724b1ee9f