Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8bc9a1c69287b6…

MALICIOUS

PDF

83.9 KB Created: 2021-03-18 09:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e06ecbf9d3f7efa4b753b5e4a74df9b2 SHA-1: b1bd5dbf985cc80c18bc26f3d4d3326482211ba5 SHA-256: 7c8bc9a1c69287b6f14a3d412435db73294d517cbd8a21c631155709065e7ec4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/award?keyword=proyecto+arquitectonico+definicion+pdf PDF link annotation
    • http://rakadan.sportsontheweb.net/salosufilidexesefelodalor.pdfIn PDF document text
    • http://doruguduku.iblogger.org/62230724502.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/ie1kKUZ/82616448067.pdfIn PDF document text
    • https://cdn.sqhk.co/zerumowo/igjaggv/first_order_stormtrooper_robot_price.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/ggdjagh/new_york_company_outlet_memphis_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/gJzhahg/jutapinufigesamuved.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/misplaced_modifiers_exercises_with_answers.pdfIn PDF document text
    • http://zevupixikug.mywebcommunity.org/3d_to_stl_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/fJghBhf/pagugub.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://tavawefojob.epizy.com/topographic_map_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/4442776036.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_e4a46aff8bb848ea826d6bd23125592d.pdf?index=trueIn PDF document text
    • http://sabiwilurase.atwebpages.com/traxxas_summit_brushless_1_10.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/90442963803.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/google_what_does_case_in_point_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/is_8000_a_lot_of_money_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/sakonejevurilomavejo.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/how_to_use_crackle_glaze_ceramic.pdfIn PDF document text
    • http://fonojuw.epizy.com/current_developments_in_science_technology_and_information_technology.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_5befa23a07eb4fbbad2b5ceb7d5a82f0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 5048 bytes
SHA-256: a1a9489ac82d5677efce593119c1dc11bbbee13831d43771bd0e1268bfb7c6a7
font_01_sfnt_off000109a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A1 12520 bytes
SHA-256: c57225ba860666d38c205467be02c48ab291eeaf0817c3c0f2e97610e90c6aa5
font_02_sfnt_off00013210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13210 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e