Malicious PDF — malware analysis report

Static analysis result for SHA-256 364f0148884250f0…

MALICIOUS

PDF

85.4 KB Created: 2021-09-20 07:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e676b8ee74400cf5d73bd3a5e7fe046 SHA-1: bc066ac1d8e7b5d5899cacffc67919c58c94ee4b SHA-256: 364f0148884250f020d6d3e89ff695469ee2686889933adeaa696e22fcb42eb6
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The presence of a 'Download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://allytemp.ru/uplcv?utm_term=gta+v5+obb+file PDF link annotation
    • https://fsreloading.com/userfiles/files/renoxi.pdfIn PDF document text
    • https://adikketiga.com/contents/files/jozajif.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/pukuvisarovenumubujadusok.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/27639423750.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109040033489354.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/64560438681.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/23274140677.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/90630931601.pdfIn PDF document text
    • http://insei.eu/userfiles/files/fanedosodisi.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/gorulitobudixilajinofixol.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/85511263779.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/pugivapuvuja.pdfIn PDF document text
    • http://sabancilojistik.com/userfiles/file/fujog.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/2588221186.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210904195913.pdfIn PDF document text
    • http://pi-consulting.ch/download/futavolusawilexi.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16135788092c05---pawoturewagiwepum.pdfIn PDF document text
    • http://temple.mo/userfiles/file/54420553681.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/48026741876.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/10254403046.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/novizirasaxa.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/pikixijajodox.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/fapuxuwunelelavivov.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/zawekugonopagurovokukew.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/gapanuzaxomupifegexadivun.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_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 10212 bytes
SHA-256: 2fe0d5b4f7c6abd1617a0179e293d23cb22e774a0130363490c9cb02daeace78
font_01_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 18296 bytes
SHA-256: e3d46fca8b10ad20f57b54290b02a46d603e913cbdfd7a5e557943b0e3245fa0
font_02_sfnt_off00013036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1