Malicious PDF — malware analysis report

Static analysis result for SHA-256 410d700025e2052f…

MALICIOUS

PDF

79.3 KB Created: 2021-09-09 23:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b407b3d257c2a26d59f16c5eea71ae33 SHA-1: f812b2b85282138412c90ce74b2b50e36878707f SHA-256: 410d700025e2052f1af2422fc6eb6c07d65d330329c6ac598172a3546e36af56
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a collection of other PDF files, likely for malicious SEO or to serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://lltsg.com/uploadfile/file///2021090619505761.pdf In PDF document text
    • https://everestart.com/images/stories/file/muzasibumakugodisorega.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/ximibapub.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/81271879696.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/52432351558.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/vugukeginerirokaseguverop.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/mejesagokabi.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/17440693440.pdfIn PDF document text
    • http://yensaovinastar.com/media/files/17595618985.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137fd90459dc---bajaj.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/16439556098.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/vonojolixalovivinar.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090817043948.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/pevami.pdfIn PDF document text
    • http://www.77ice.com/upload/files/paborasuvun.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/mitijadujukebi.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/pixesegudip.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1630749723.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/38581137410.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/pekez.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/5a60754e28a75add401fcf4232faf7a0/5273212270.pdfIn PDF document text
    • http://cosyromania.com/media/file/78621422136.pdfIn PDF document text
    • http://fitviewer.com/files/file/kovisebijuzuxiwu.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/xipaxatarasoxetiborilezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+hack+gta+5+online+pcPDF 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_off0000cf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF12 18220 bytes
SHA-256: 639c1b3a04a8ff738bf889e1f1f8b6d12fa5bd630d5aeee1342fdd2006597183
font_01_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E8 10688 bytes
SHA-256: 51cb3954c232fd58bb6744af27023a1b6616938a7266ac4ec09aa0250c98090f

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