Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1238238ec475bf7…

MALICIOUS

PDF

81.5 KB Created: 2021-03-25 15:57:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bebeda157bac7e7abbac42ce2b1e1145 SHA-1: 235bcf2ed9aae8e70b97dc5a3c102ab66cc3bd82 SHA-256: c1238238ec475bf7167f5e3b56a3bd0c7991c19b755d55b12bf6faaf5e7c3c0f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/wix?keyword=paradise+of+the+blind+full+text+pdf PDF link annotation
    • https://xulakuvoloja.weebly.com/uploads/1/3/0/8/130813987/409549.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/JJ6ohfR/vavugoxera.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/XgdiaW3/caption_for_photoshoot.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/ijhjjcF/megacraft_pocket_edition_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/hqjbiew/xakukilojiwigadizafedak.pdfIn PDF document text
    • https://vinixojaz.weebly.com/uploads/1/3/5/3/135312356/ab3909d43c.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/xkMUmhg/lego_blacksmith_6918_instructions.pdfIn PDF document text
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/92e809.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/0EoNhc0/kusodixogeworifabulo.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/eJia6id/46883886804.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/HgiHLlE/amazing_wallpapers_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/ighf260/spacex_mars_colonization_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_6df0aaa66f6d4a49bfbe3fb811d5dd36.pdf?index=trueIn PDF document text
    • https://165b0ab0-89c3-4517-b88f-e2bd0c55d975.filesusr.com/ugd/97b555_15d528fe91b1464195f682251fed3840.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0530ee33-4daa-4660-a290-1d222d6bcf89/acer_aspire_v5-571g_i3_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb45bcaf-593d-4bac-842d-769298650915/88358797656.pdfIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_060075f61eb6421a867c656d8759c201.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_db3c316ed1454bde8ad0e0abcf26f174.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_7c74eb767c0b4fbdb870538b6e78802e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d0275f-d0b1-4aa1-acec-0842fb105ed9/tumod.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_182d6bc0ae454c168a94b16098d7b7c5.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_11e0f1cafd5844e8bb851f1f687b8b95.pdf?index=trueIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_ee759229b1834d1ab8e906dcff3f7afd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8ca256-6c61-4aa8-bfe2-09c99e03e095/camera_shots_and_angles_in_hindi.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_3228f819e4754f46b7f894d62909bde1.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 5220 bytes
SHA-256: 3aa99009530e7ac47f7fba17884c49ec328ae5002c430a4fee833069a8d25f2a
font_01_sfnt_off000104e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 11188 bytes
SHA-256: 9231159df938147cb6047cf4cdf80086deb13e8937ee2f705b655523b430f63e
font_02_sfnt_off00012a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A71 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3