Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7ce373b7372aa0…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 19:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 041f3a1c61c31e5066a68d05a43a0f9d SHA-1: 3717cb5b59df93b939b5f51c30c3fc02924d2893 SHA-256: 3a7ce373b7372aa054616f88d35760f53d03b05b69808d303459bdcae0328419
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The primary malicious URL identified is https://botokaw.ru/123?utm_term=view+manual+page+break+in+word+2010. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=view+manual+page+break+in+word+2010 PDF link annotation
    • https://cdn.sqhk.co/givifevulo/Dsigjhl/movistar_plus_gratis_android.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/d3e038f.pdfIn PDF document text
    • https://butavuzi.weebly.com/uploads/1/3/2/6/132682386/xexoberimefezofuramo.pdfIn PDF document text
    • https://wufaderafezika.weebly.com/uploads/1/3/0/7/130776219/fedikipogexa.pdfIn PDF document text
    • https://gemaxapofa.weebly.com/uploads/1/3/2/6/132681544/86900.pdfIn PDF document text
    • https://zatuzura.weebly.com/uploads/1/3/1/4/131453499/4503813.pdfIn PDF document text
    • https://suwelebebos.weebly.com/uploads/1/3/5/9/135959353/8733900.pdfIn PDF document text
    • https://cdn.sqhk.co/tigufarejeti/jihbjbC/colony_halo_wars_2.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/tuviroxub_wibejokul.pdfIn PDF document text
    • https://gelowoxolup.weebly.com/uploads/1/3/4/7/134703814/1180675.pdfIn PDF document text
    • https://zuzatalo.weebly.com/uploads/1/3/4/3/134326893/zidogozudi-sonap.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/a641fe97-7071-49ca-8026-c8847306c033/lamekepukakuvoloxufipali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a8b828-1328-4d12-8768-b4d6b71aadf2/36184624469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce48a38-e7f3-48e7-9ed5-639ef44b9068/15630785844.pdfIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_f52b141448e1455bae686b48e854b3f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e2900f-3c8f-4d8b-bae2-5d50554bece7/55778164115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d0725e-fcd5-48f5-b7fe-1c3b716916b8/pathfinder_life_science_books_free_download_part_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9bead9-1f6f-4125-a216-5c716b82a4a8/hp_pavilion_dv6_adapter_price_in_india.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_a2169e663d9d4e76a82899204dc9328c.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_1617563e3e8b4baeb88e608faa478fc0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/821d5eb9-e97f-4edf-8caa-eecd47eb767e/snow_white_and_the_huntsman_soundtrack_florence_and_the_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddbd9986-04c4-488d-ab67-88b4a6513276/hp_envy_4500_printer_cartridge_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/821e87d0-561e-49d2-9c23-c9513093df42/todizetevonusara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e09f272-cee1-4c8f-b5f0-cc9c197d831f/diablo_3_set_dungeon_guide_crusader.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_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 5688 bytes
SHA-256: f2d5fae556f66beff9093408b18bf1733f987190f18d3862565b4e318018a4d5
font_01_sfnt_off000106af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AF 10216 bytes
SHA-256: 9dfef990618678315d9930daab56beaf132653655e94ecc92f8f4c74289223e1

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