Malicious PDF — malware analysis report

Static analysis result for SHA-256 296534c2290c7503…

MALICIOUS

PDF

71.4 KB Created: 2021-01-29 06:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 023e0f2791117862fbc66ef20b86897d SHA-1: d52999ff2ccf40bebf16a64f6297f07c4db38c0d SHA-256: 296534c2290c75033bfc4a92fe855727aedf76afa06d51c2a3d504d93393cb62
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/aws?utm_term=boeing+aircraft+performance+pdf PDF link annotation
    • http://lofitner.buzz/enzo_mari_autoprogettazioneypjlm.pdfIn PDF document text
    • http://smotrikino.fun/truck_simulator_offroad_4_hack_apk_downloade1kb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff018434210a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5fe9b4b3d0d31.pdfIn PDF document text
    • http://xploitcrew.io/fakupebalej1u84.pdfIn PDF document text
    • http://xurunoxawes.iblogger.org/vadaminajubumewa.pdfIn PDF document text
    • http://reduslim-italia.website/37609490872w8du2.pdfIn PDF document text
    • http://sokfresh.fun/xetonirosigelosez5lhka.pdfIn PDF document text
    • http://apkweb.net/17196295246tql39.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/7ohddKy/alienware_keyboard_software_aw768.pdfIn PDF document text
    • http://vlada4.xyz/download_kiko_run_mod_apk_androidbu8jz.pdfIn PDF document text
    • http://sfhgfje5df.xyz/domomawobolonafopasoxegiph9vz.pdfIn PDF document text
    • http://cherrypimp.online/std_10_gujarati_medium_textbook_download_2020tys6w.pdfIn PDF document text
    • http://deflecfcvy.best/birdy_grey_dresses_dusty_blue0gwce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5feafd258ee1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FA 5316 bytes
SHA-256: 95481b729af96856fa980f82de153f8999e4b8bd7fe3968592a610f53337e3a2
font_01_sfnt_off0000ea02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA02 11520 bytes
SHA-256: 96ae00bf81f143518788d2bd8c302a8a4d809af581cb1100862c3e7c41b736d0

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