Malicious PDF — malware analysis report

Static analysis result for SHA-256 298cc96349122d00…

MALICIOUS

PDF

89.3 KB Created: 2021-05-10 09:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e3bd0a19393184eb605e8dacc5d1e24 SHA-1: 915a598a72cc6b6ee134c7f851b644594de6df63 SHA-256: 298cc96349122d0017f83860a13515bff3a8812dffb58ad373e4c21028c4c18d
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 0.9991

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://jottigo.ru/strik?utm_term=forged+in+fire+quotes PDF link annotation
    • https://cdn.sqhk.co/rojisixel/dhfXibp/tejasuponemotugibavi.pdfIn PDF document text
    • http://faketikus.22web.org/kufojuzolavuz.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/zIDAPij/vivodixepewelekek.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/Bno7Dii/48379350089.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/NiejgG2/london_to_brighton_veteran_car_run_2019_photos.pdfIn PDF document text
    • https://diwoneguni.weebly.com/uploads/1/3/1/4/131407083/xafizovuvume.pdfIn PDF document text
    • https://kuwesitupimanu.weebly.com/uploads/1/3/4/0/134095951/8521907.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/cefdddc82.pdfIn PDF document text
    • http://bakuvuwojesefa.iblogger.org/abcd_movie_telugu_songs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_3558d53ddeda4d07aeee1054bb293557.pdf?index=trueIn PDF document text
    • http://vefugiw.epizy.com/how_much_is_a_schwinn_frontier_bike_worth.pdfIn PDF document text
    • http://safivobuvap.epizy.com/11384757640.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_7ac7eb1ace9449e386e56b1d495952e6.pdf?index=trueIn PDF document text
    • http://fijukarevi.epizy.com/ballade_pour_adeline_noten.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_852834b3ce3f494fa71dfa43c160f97b.pdf?index=trueIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_be3f04e158304f2c91167b63e90391f8.pdf?index=trueIn PDF document text
    • http://bivadalov.epizy.com/nivemudabonisonefufevi.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_b8c767fa23944e9fb9ef295292290e7b.pdf?index=trueIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_d682d75b5a8940dcab40b1416837700d.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF98 6416 bytes
SHA-256: 6c1d6fb60a72ef32d314f07852d966859d59eb4b24b52790d3cc69c3f62680c2
font_01_sfnt_off0000df6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 4916 bytes
SHA-256: dd662ab8a78283200fcefa9848df168ad7ceb6410f8f2bc9679b013f3a7dec8e
font_02_sfnt_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 11600 bytes
SHA-256: 69c934c684951fe82d85d8990254d53506ec2d52f0e1cbce4ea424c4c2ae01df
font_03_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 11032 bytes
SHA-256: 3a316f06a9035483f2c1659934891966b8db521705d9495e56911f73f842af08
font_04_sfnt_off00013a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7E 16256 bytes
SHA-256: 91dd9b92bc71263aadafb959dc57ed89a7e63adb1bf59f66af3c4aaacc33cdcb
font_05_sfnt_off00014fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDB 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6

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