Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e681e60d5a4ac6…

MALICIOUS

PDF

88.8 KB Created: 2021-06-12 23:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cbf65c5e7858ff80e692fa80ea54dc52 SHA-1: ce85402f1c0d58ea889fcefc5e85f0a09c2773ee SHA-256: 60e681e60d5a4ac6c878fb743bcaaeb65ef25d15599e2d82002ade8096d81d16
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure for downloading a movie, which is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://cructi.ru/pbw?utm_term=peaceful+warrior+download+720p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472185/normal_602de5ad0dacd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388422/normal_5fe296e942674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_60322b73165f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_6013bc58cb04f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_6066bf7203275.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412173/normal_5ff7ff3d36fe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369923/normal_5ff06f8ee690d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_606369bf712d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_605c34bb16561.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495241/normal_5fe0bcffd1016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_606e8f4b41d1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b242e4b-e66f-4a70-9219-f18d1f181d63/16735083456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7530bc-b306-4334-b834-2f63d0229e79/25712277281.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/145157775/captain_america_the_first_avenger_tamil_dubbed_full_movie.pdfIn PDF document text
    • http://lijunew.pbworks.com/f/73143958746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55434668-ea62-4df2-8216-e1d441ed61c5/39981648324.pdfIn PDF document text
    • http://nutafojijoki.pbworks.com/f/xovatewel.pdfIn PDF document text
    • http://zegigubame.pbworks.com/f/cassandra_jdbc_driver.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/f/69445564000.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/f/where_is_the_cultist_ship_north_of_thera.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144570816/how_many_types_of_bolts_and_nuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6637dfb-4db0-452c-843e-7ef32002a014/intensive_english_programs_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47e74b7-15f6-4c07-81d3-2c3acc484663/nezujupabuka.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
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off000118b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B3 5416 bytes
SHA-256: f4dab3f9b01ee0bca98097d91c8412739c092edc1ec788a1f10127b43ba711cc
font_02_sfnt_off00012b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B50 12672 bytes
SHA-256: 854561cacd0b7759e9f887d0ac2876470afa7150b10da9db2aad41a2a52348bf