Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fc41e93834c1cb…

MALICIOUS

PDF

81.4 KB Created: 2021-03-28 22:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 74578245f6c4ac3888dc026b252c4d3b SHA-1: 1613cbbf8ca31b78739a3d216814ff489652569b SHA-256: 17fc41e93834c1cb24d19c01c835d5f3155cf2cabe1efe2eba945bb1221fe965
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://golowaki.ru/wix?keyword=pes+mod+apk+4.6.1 PDF link annotation
    • https://cdn.sqhk.co/nogawevorus/hjeYjgz/the_walking_dead_2019_season_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496216/normal_60581f794b9fd.pdfIn PDF document text
    • http://tafuvomilo.22web.org/chevrolet_aveo_2009_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_6035a7ffb867a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_5fe731543afd0.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/7PhfOji/telegram_download_link_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/Shbjhm2/cribbage_rules_last_card_31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwopugivowivo.rf.gd/poster_design_template_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00060a9-e886-44aa-a83c-7c4a947f2147/jee_advanced_organic_chemistry_syllabus.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_125d4cc204be44058c6fc25b07361566.pdf?index=trueIn PDF document text
    • http://girofili.myartsonline.com/is_nikon_d3400_full_frame.pdfIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_2bc19cf2e5184e3595d90bf10cd3ea18.pdf?index=trueIn PDF document text
    • http://fadadopotonu.epizy.com/18585282641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82a13c0-9c49-406b-a0be-abbaf128e2b6/what_does_it_mean_when_scale_says_out2.pdfIn PDF document text
    • http://fojiguxojed.epizy.com/71137009582.pdfIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_734ac9beed76464a918d594be72a9031.pdf?index=trueIn PDF document text
    • http://nononulavojiki.myartsonline.com/how_do_covalent_bonds_work.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_924987a3202b4561bf8f636d56dbd4e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/550fc21b-9379-484f-a2c2-36a394e7173f/nopudo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 5368 bytes
SHA-256: ce737cf96a073573b48140746df25b6e8e8e79f715d1211e0fa361f574472b16
font_02_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 12592 bytes
SHA-256: 19f51e4c04737ed7a5ba715f138b69cf25c42bf2cca3830fdec169179a607a4f

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