Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff19988f0cef88d…

MALICIOUS

PDF

88.8 KB Created: 2021-06-02 09:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 060a634f4e0568f33e37b9a66bf98e6b SHA-1: f9a58320f7afb7435dd329af2ee1ac26d4e0f729 SHA-256: bff19988f0cef88d29dab20a16744291b4472a093898e4cc23b6831c8a4a711b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://krisoc.ru/pbw?utm_term=livros+radiestesia+pdf+gratis PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475853/normal_5fce0a1aa8926.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/daxenajuguja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_5fe99acd62f3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5ff4349037eb2.pdfIn PDF document text
    • https://pewofofuvalok.weebly.com/uploads/1/3/0/7/130775386/384f9737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465389/normal_60314c67115c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372378/normal_5fed646e74036.pdfIn PDF document text
    • https://feravenokitaj.weebly.com/uploads/1/3/6/0/136095553/vopenukuripinitofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5fec9abd1c48e.pdfIn PDF document text
    • https://xexajuxeleseg.weebly.com/uploads/1/3/4/5/134592224/b98408326ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498345/normal_600c3e653013b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fe4d50584b38.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/bojinudizo-pilubizisujep-wawaxiliv.pdfIn PDF document text
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/8174469.pdfIn PDF document text
    • https://tajusubinem.weebly.com/uploads/1/3/4/8/134886452/8751971.pdfIn PDF document text
    • https://refunijuxi.weebly.com/uploads/1/3/4/7/134748157/buneza_rolobemim_zegusinurasuga_zariwag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_5fdb0fa98eba4.pdfIn PDF document text
    • https://lugifepitel.weebly.com/uploads/1/3/2/7/132710690/3538528.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/dd7f183b-d317-46ec-90e8-cb1a30e5f0e8/beamng_drive_tech_demo_download.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144426354/lukujenulukonojimus.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144427029/what_is_pipe_and_map_in_angular_7.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144495210/13429729783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a547a182-1cb3-495e-ac41-c5b628444a82/19243272270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242de7b3-e08b-44ce-a696-aeb38bee2c06/can_you_get_a_new_drivers_license_online_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba1bd58-875f-4c78-84d7-0660c77809b3/are_ryobi_drills_any_good.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_off0001198f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198F 5180 bytes
SHA-256: e47d8d7d3d8bd05a2fcca55532510cd9e82532c08480d3d7bc4a123a3e6592af
font_01_sfnt_off00012b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4B 13328 bytes
SHA-256: 7ae071b30a266331c3b5fff50ff90da912ef468fb12930d1135536cbbc7637bf

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