Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b496e881cb6fc6…

MALICIOUS

PDF

88.4 KB Created: 2021-04-18 21:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 896888745d5f39f09b789fa4e471ccd6 SHA-1: 7c76a90d023f2235fe3adadfe958b9c067ec7717 SHA-256: f3b496e881cb6fc6e7daa9b8d12d48105bb2bfafbd561e1b9d79aa839d484bd0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains metadata related to a product search, reinforcing the lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=polar+ft60+battery PDF link annotation
    • http://fakaripeti.xyz/61912653343lr7f5.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/husky_120v_inflator_review.pdfIn PDF document text
    • http://bostpolamos.site/wu_tang_saga_episode_10_songpxr56.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/4YChhhg/notes_for_my_son_review.pdfIn PDF document text
    • http://itrom.fun/how_to_use_krups_waffle_makere2dz7.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/jjchj7y/58726000725.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/gig9Uon/murder_mystery_game_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/haFH2ic/90090157866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419642/normal_601fab1aed476.pdfIn PDF document text
    • http://vekvelo.ru/frp_bypass_apk_android_7._0_nougatbhdtl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_605997e03db2a.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/hW3zL7D/bluetooth_smart_switch.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://uploads.strikinglycdn.com/files/46327674-60e7-441a-816f-52ce45ef211d/tazefomigidimonepe.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_f68910b0fe344ad29610efb5eba7174c.pdf?index=trueIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_d21d332af1944b8abb636f775cb8d8ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/397f199d-6f87-4ddc-8da9-215ab24924f8/14173524106.pdfIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/tifone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b196c104-1c06-4abb-ba76-070ba11c05ef/black_magic_book_in_bengali_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6da4422-ff6d-4451-947b-8612ff583a25/24682515401.pdfIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_25ad8df114b14b43a2021dfd93f02c10.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_off00010eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEF 4756 bytes
SHA-256: e0c70fc33e727be29644811606a4377bf904a3d5a096e6db3fd6d14e694b6fe6
font_01_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 11936 bytes
SHA-256: df07be6c936f04098bb7d5b4514dd53db48b3351903e8b45ef3349d9dc7acd48
font_02_sfnt_off00014672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14672 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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