Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d6ddad96708dbf…

MALICIOUS

PDF

78.2 KB Created: 2021-02-27 06:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c2c6f9267a213ac8341c9e4c65bd810 SHA-1: a637d4b1f2438d2b4347c783383ff04e3ec64579 SHA-256: 10d6ddad96708dbf3f35fb79b97616443b7be09b53e836259d7f4d2512ea9e74
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of creating many links on disposable hosting, suggesting an attempt to obscure malicious destinations or engage in SEO manipulation for phishing. The presence of external URIs and the overall structure strongly suggest this document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=t%25E1%25BA%25A3i+appstorevn+apk PDF link annotation
    • http://zememor.sportsontheweb.net/dell_optiplex_760_upgrade_cpu.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/57940679580.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/what_is_the_healthiest_bread_at_subway.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/88787168930.pdfIn PDF document text
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/zuvadomekikep.pdfIn PDF document text
    • https://fijuxibafituwu.weebly.com/uploads/1/3/4/1/134109117/fugerevupifadizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5fcf418a152e8.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/favofiva.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/defying_gravity_wicked_sheet_music.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/41f8d12c9f7.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/what_bible_says_about_adultery_and_fornication.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/ccKibhj/99816908707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bewefesa.epizy.com/jofusibididubovolofap.pdfIn PDF document text
    • http://dalunalunim.epizy.com/vijelokudetikadev.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/68006754274.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_off0000df0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0D 5120 bytes
SHA-256: 0f64d3570211351d51982ce0c030cbbd0c0779ef146007ef32934f7d0e204c1a
font_01_sfnt_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 10932 bytes
SHA-256: febddd587fe771089389c6702588bf2fd63201f8cee768f18f826cbcca6f607f
font_02_sfnt_off00011438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11438 16332 bytes
SHA-256: d8e98ee7cbd636ba7fdcdaedb8d3428f108fde301f6e9d131df7640f0741ad74

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