Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f720ea2f6c4ffc…

MALICIOUS

PDF

80.3 KB Created: 2021-03-28 16:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9eb6d271ebcf084b59ff2a43aa8125fd SHA-1: 53dca1f938dfdc8cd9c6deeef5134e16199c9c6a SHA-256: 07f720ea2f6c4ffc1fac3306c09bb50ffa72fae4bcc07a5ea9a53c6ab9561830
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=sex+offender+registry+ny+free PDF link annotation
    • http://airet.space/whirlpool_refrigerator_repair_contact_numbere0zkj.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/idgcjgi/linesedazidimekuxuzivuga.pdfIn PDF document text
    • http://pink-echo.club/getmega_mod_apkadr9n.pdfIn PDF document text
    • https://cdn.sqhk.co/lusesito/LSWQihU/superbike_racer_2019.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://rorawakufajixe.weebly.com/uploads/1/3/4/6/134653883/8e7866.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/rhcGhf0/screen_time_macos_high_sierra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_6014733d0a058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_60603d4bc32e7.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/mogupatijos-rigew-xetisam.pdfIn PDF document text
    • http://good-production9.site/33869603465t7zu6.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/sotun.pdfIn PDF document text
    • https://xanilavobug.weebly.com/uploads/1/3/5/9/135959945/diner.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/lid0zhc/lausanne_2020_youth_olympics_schedule.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/lidaxarenuvusa-tadukiratezeru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_6023dbb4802f0.pdfIn PDF document text
    • http://womenita.fun/pikafomipebgh7i3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383444/normal_6004dde0bf116.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvaworizon/exhiktv/country_music_hall_of_fame_female_members.pdfIn PDF document text
    • https://cdn.sqhk.co/jolekusij/dbC4bzS/fanoxirewabozirifed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460680/normal_6003471c964c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000e9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 5104 bytes
SHA-256: fa0976580a4f24d30ee3ec28dd1e4ff8108745adea9276421441d0a89a0cb717
font_01_sfnt_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 10212 bytes
SHA-256: 780be6cc83bcdd7de5f6373888fc7025317b7f91ada278b64ed66684350d16bb
font_02_sfnt_off00011e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9A 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7