Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faf3e2ee2a8e390…

MALICIOUS

PDF

94.3 KB Created: 2021-02-08 12:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1a9a4e3d154ee0289e84af8f649e4637 SHA-1: f1298ef56941a496f9dd6d4695a75d6cc1d99466 SHA-256: 0faf3e2ee2a8e390b6b43a00f6f55384edb4c3eb2f630091af04dad05b8dfd85
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The presence of external URIs and a link farm suggests the document's primary purpose is to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/aws?utm_term=authorization+bearer+token+format PDF link annotation
    • https://cdn.sqhk.co/kowalaxu/a54qggI/fonupilunivelefizete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_602070d1554c7.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/b35656fd.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/iisjghi/what_causes_cold_patches_on_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/hjiiaih/david_hopper_stranger_things_season_4.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/tiaxVic/janikajolojalorejuwelin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fe507a6f3498.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/juicctc/73797039044.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/iFwhgfN/live_video_camera.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/eggopGB/53557395945.pdfIn PDF document text
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/6211680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fedec6342ef0.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/ChdUjjA/32482741474.pdfIn PDF document text
    • http://pubgmobiie.com/sunrace_12_speed_xd_cassette_reviewb8192.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/6521ec395a556.pdfIn PDF document text
    • http://samelike.site/17749948352sa76g.pdfIn PDF document text
    • http://avto-document.site/rsum_des_misrablesjpuhw.pdfIn PDF document text
    • http://gbarb.me/superhero_extreme_jet_ski_racing_and_water_racersc3wye.pdfIn PDF document text
    • http://anyita.space/4_pics_1_word_level_2221_answer1imio.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/1fyvgjd/second_galaxy_nef_ship_builds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_600e82d9dd805.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/gfyhgEA/descargar_pokemon_quest_para_pc.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_off0001189f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 5040 bytes
SHA-256: 61240a900d51e727005360d3b5cd5b42bd93654d7172500d2e9c7038bfd9d485
font_01_sfnt_off000129a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A6 13868 bytes
SHA-256: 3dc5b756e819cd23933882768281dd1c2f95335760f0cd06a115f388bfb47537
font_02_sfnt_off00015592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15592 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15