Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6d8f0aa7fcbd15…

MALICIOUS

PDF

73.0 KB Created: 2021-02-14 00:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 53d90d4deebc30f31b5906dac6152861 SHA-1: dbbb748caddfbb8249bdebd8b26bf1f64211eb9c SHA-256: ab6d8f0aa7fcbd159836a1c1a5e8507c89384046ee39a1cd0d87eff4e01c14dc
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to external sites, some of which are hosted on disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

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://maypoin.ru/wix?keyword=flor+de+lis+tattoo PDF link annotation
    • http://ketadiets.site/app_backup_apkmonkyao4i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5fe39d1cceb06.pdfIn PDF document text
    • http://yellownatural.space/56604266753bih1i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_602110349e3fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5ffe56e8f2f92.pdfIn PDF document text
    • http://rocketdocs.us/xujajulixaxupwq3eg.pdfIn PDF document text
    • http://zizopeja.22web.org/62113258959.pdfIn PDF document text
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/pevijigefepuj_timokidosegasut_nereko_wemorekuleped.pdfIn PDF document text
    • http://pink-echo.club/beastie_bay_mod_apk_2018mgm7h.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
    • http://sufumawug.epizy.com/5591504149.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/hungry_shark_game_unlimited_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/dublin_airport_flight_arrival_information.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 4456 bytes
SHA-256: 07f0376241c1dbcb00f947c3871d25cd89d7b53ac3e4ced644bd606e713d702a
font_01_sfnt_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 10400 bytes
SHA-256: b106fce8f33a3522e6e0fc45a78af3a79575ac31d59a4f9f24094932354ac882
font_02_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.