Malicious PDF — malware analysis report

Static analysis result for SHA-256 0016234362337c27…

MALICIOUS

PDF

46.6 KB Created: 2020-09-18 03:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 08fcf1d66339de664f62b920454a6ca7 SHA-1: 2503fab55a8f74e3f96fe70cd700100a97d76970 SHA-256: 0016234362337c2705ee0d5e84a4cbd39cfa3f853c064df421e1f61e673c3cde
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.cc/wix?keyword=electrical+circuits+quiz+answer+key In PDF document text
    • http://zutotaf.rkspeech.com/uploads/1/3/0/8/130874030/wetizudobilu_vemib_domuxon.pdfIn PDF document text
    • http://gefadid.premiertags.uk/uploads/1/3/1/3/131397997/3114930.pdfIn PDF document text
    • http://files.photoforanyoccasion.net/uploads/1/3/0/9/130969772/sivuwebaxitotoboti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f16653aa-7f83-429d-bf51-3716ca0b4910.filesusr.com/ugd/46a5ae_625f54c485f742339aa466f7a13a9c25.pdf?index=trueIn PDF document text
    • https://bfbc055b-f9e4-41dc-970a-4780cc2f1f23.filesusr.com/ugd/682d1c_67ac12d243584a21addf1fc9d69467d7.pdf?index=trueIn PDF document text
    • https://c446c157-e2d8-4190-975a-f7c95e424241.filesusr.com/ugd/e1a791_8988b10986144b6792820e11554af2c0.pdf?index=trueIn PDF document text
    • https://7790bb51-861d-4755-bc2f-5b08c1b8e3b6.filesusr.com/ugd/ea5d7b_c4c59dbbbf944ecead35ccc638f19f13.pdf?index=trueIn PDF document text
    • https://217531d4-5abf-4565-801a-ff5c71d20921.filesusr.com/ugd/625844_842a3db82948496696983bc9ff160661.pdf?index=trueIn PDF document text
    • https://7642233e-560f-40c9-9903-b9d180fb68a9.filesusr.com/ugd/1da05d_27b49e3a09234cb9b846e1b38414878b.pdf?index=trueIn PDF document text
    • https://1d461ed0-fa2b-4853-9945-720a20e0df1e.filesusr.com/ugd/ee9d3f_94a69c3ebfba43899082a1b007ea50b8.pdf?index=trueIn PDF document text
    • https://a1dbfcd5-8ae0-4388-91fd-28c83a9f48f6.filesusr.com/ugd/370b54_3bed3751333e42ea929140f5763aab70.pdf?index=trueIn PDF document text
    • https://df011f52-42f6-47c6-93ab-0cb2f72d1e84.filesusr.com/ugd/a51aec_b1303e365f7c4a46a764f676e1030235.pdf?index=trueIn PDF document text
    • https://bddec66a-e2cf-4c74-82f3-c4ccedd95153.filesusr.com/ugd/0af078_f37ae750104545328a322b99b32bb289.pdf?index=trueIn PDF document text
    • https://0011d2ce-f0a4-4a91-90a7-157280d47bd5.filesusr.com/ugd/954c8b_794a76fce5c640e7b237a0a940d54762.pdf?index=trueIn PDF document text
    • https://0cda4feb-2b5f-42ca-8a05-8e2c7e671c00.filesusr.com/ugd/95ea6b_d93cf35e98814d76bbaacb625d86e51b.pdf?index=trueIn PDF document text
    • https://47b6114c-99b2-4eb1-8660-bbe00d7c6606.filesusr.com/ugd/d13e1f_e1b8b17b07424b53bb8620241259b3e7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B38 5184 bytes
SHA-256: da86ee47d6a6a31a18094d929a4040708ee3d85610eecbddb0087a01e84b4779
font_01_sfnt_off00007d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D10 14796 bytes
SHA-256: fa2a22ea017c8f9b2589bd98aeeee510e150ab91b1c13381c2f35f701d6d47d1

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