Malicious PDF — malware analysis report

Static analysis result for SHA-256 02716ef87a7fe136…

MALICIOUS

PDF

87.5 KB Created: 2021-09-13 02:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bbf023b81c614ac57522724e7b5421f3 SHA-1: 2850d967929ffbc74fa44dffe7ba7cf4f4e40531 SHA-256: 02716ef87a7fe1366c4bcbc47f148d32ac9046ea1fa61073b18aa1fb7c02fed6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by a machine learning classifier and ClamAV as malicious, with high confidence. Heuristics indicate it is a link farm on disposable hosting, likely intended to redirect users to malicious content. The presence of embedded URLs and the 'call-to-action' heuristic suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mps-india.com/userfiles/files/29995420682.pdf In PDF document text
    • https://nutrishop.in/ci/userfiles/files/4589262159.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/birowevazixebax.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/66940088016.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/22935940439.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/xasufesegemukadabi.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/jinuku.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/23131443008.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/51495721148.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/19363617188.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/pibuximodagiwogurulalimuf.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/pexivovumegejubirukufu.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/52169661431.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c6dfeb7d6---kegokido.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/kozagiwurowuwas.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/88851396008.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/63126158101.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/nutezobuvataxixepizine.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/bapekegekegomilise.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/xavij.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79671506243.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bvmrg5u30h07kfv30ueddlm9q3/zewikomunupijirujuja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ps1+emulator+games+for+androidPDF 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_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 10852 bytes
SHA-256: cc68d3e2394d064391ebe484332cc58d05508a11e3d310358c9ec3bb3c945917
font_01_sfnt_off00010ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 17508 bytes
SHA-256: 1d5338c3a801156c9adcd3a97c0fc6d7326407b8c9b2b40056c20ead609d495d
font_02_sfnt_off0001380f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1