Malicious PDF — malware analysis report

Static analysis result for SHA-256 d794fb071170aebd…

MALICIOUS

PDF

97.4 KB Created: 2021-03-20 01:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 11604054fa5af1b0e037d8f435c4c727 SHA-1: 30a36d6ad00d73f1ceab776844b7972932abec2a SHA-256: d794fb071170aebdca38a667e65768fbaa4282912c5b1abf416a6eea4487cbf5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of link farms on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a game, likely to disguise the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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.
  • 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://resalured.ru/123?utm_term=archeage+unchained+ebonsong+leveling+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5ff23dbf46cab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fd13ab224e4c.pdfIn PDF document text
    • https://rupusuji.weebly.com/uploads/1/3/4/8/134878943/kafuven.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/pubimosalebozonimapoxob.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/gihhCg0/ludus_gladiator_school.pdfIn PDF document text
    • https://kadutazufe.weebly.com/uploads/1/3/4/6/134639852/lulufurixawufidalav.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/kolukapurif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_6032953fb13aa.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/sozipasorupebibaz.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/hgeQREe/55416643330.pdfIn PDF document text
    • http://wubosilafusim.iblogger.org/applications_of_bacteriophages.pdfIn PDF document text
    • https://sojanonef.weebly.com/uploads/1/3/0/9/130969598/1ca149170d7bc01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_6022085f171b1.pdfIn PDF document text
    • https://korebamo.weebly.com/uploads/1/3/0/7/130739662/babowat.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/0hajhei/party_in_the_usa_lyrics_karaoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_60524b04e8f7a.pdfIn PDF document text
    • http://botefin.medianewsonline.com/jafululuxulaxesepoxagunav.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/jsxgemA/mini_golf_courses_open_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/9jeihjd/speedometer_definition_dictionary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livukuxuperum.epizy.com/1995_polaris_trail_boss_250_review.pdfIn PDF document text
    • http://dilabopitomosif.epizy.com/application_form_format_in_marathi.pdfIn PDF document text
    • http://vumovofun.onlinewebshop.net/cession_vehicule_modifiable.pdfIn PDF document text
    • http://mibexalaxesu.epizy.com/uniben_admission_list_2020_19.pdfIn PDF document text
    • http://mujusitajal.rf.gd/google_assistant_apps_free.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://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_off000127fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FE 5392 bytes
SHA-256: 2606ed8a7d901e0b49a01c0801f5713148577a67b78c10c95c110e697c45c00a
font_01_sfnt_off00013a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4E 11376 bytes
SHA-256: ef8792d8a79a42552a5e25652aa3356d96d6b112464950bfe454044dc54f548f
font_02_sfnt_off00016066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16066 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca