Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5e06c89950257f…

MALICIOUS

PDF

41.0 KB Created: 2020-10-12 22:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9ac385e85128f9a0a1edb53fd480c4be SHA-1: bf21c9c6a3082761c6c20ba6e9d7c26742985248 SHA-256: af5e06c89950257f9aea62befbc3b9e666c91973b5e84f03970652ea2edc7504
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=download+android+manager+app In PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/tekerikexase.pdfIn PDF document text
    • https://site-1043291.mozfiles.com/files/1043291/pibowa.pdfIn PDF document text
    • https://site-1043328.mozfiles.com/files/1043328/62330280923.pdfIn PDF document text
    • https://site-1040391.mozfiles.com/files/1040391/wurazeredimiwamivajikolib.pdfIn PDF document text
    • https://site-1038725.mozfiles.com/files/1038725/lopupofososejawepowab.pdfIn PDF document text
    • https://site-1036676.mozfiles.com/files/1036676/xexefimesugagogelajuki.pdfIn PDF document text
    • http://files.conniezator.com/uploads/1/3/2/3/132302978/sewijabanixa.pdfIn PDF document text
    • http://keteg.alissaroca.com/uploads/1/3/2/3/132302870/tewipudotasevut-faneragiwuwamej-suxidag-pireb.pdfIn PDF document text
    • http://files.southbayscooterposse.com/uploads/1/3/0/8/130874102/wekunijo-jifijuga-jepidumizikison-denaponokozuke.pdfIn PDF document text
    • http://files.beautifulnapatours.com/uploads/1/3/1/8/131858592/tozewabufulevu.pdfIn PDF document text
    • http://files.mrsjensensclass.com/uploads/1/3/0/7/130739415/78097c69e.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/0c0c31f3-0414-47b1-a64f-3a43212bf797/18908420504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204b7cc8-cf95-4a4f-a46d-dd3f667aee9a/40610026206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b55ecc-ca03-489d-8de5-8bf039e00b67/78776813749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd0c9bd-b3a0-476f-a69b-71a3c669e399/73020747009.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6200 5192 bytes
SHA-256: e8c6b87c2f2c38f285539e8aa60f6ad1a345053765fa74de2310ebf0e1f08a6f
font_01_sfnt_off000073aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AA 10436 bytes
SHA-256: 8f0cd37375d939240116898cf97bfbb26322ff42cd9ec10809ecdfdbb1d1d563

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