Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42f63c042cbdfd4…

MALICIOUS

PDF

75.2 KB Created: 2021-03-26 07:39:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 07b0625f16d8286731b78130222d136f SHA-1: 5b6ac26f32db7abad13ac71719252c0c432ea0b1 SHA-256: c42f63c042cbdfd467408124a8627d76a3ebcf4feb4afaddac17c177c39a28a9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

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=qcs+toaster+manual PDF link annotation
    • http://tryse.xyz/6339085802bjnhb.pdfIn PDF document text
    • http://obzorov.site/fundamentals_of_heat_and_mass_transfer_7th_edition_solutions_manual_sladerkfvkz.pdfIn PDF document text
    • http://freud.icu/442808430271wjmi.pdfIn PDF document text
    • http://springwin.space/259075411375k3du.pdfIn PDF document text
    • http://diferalezug.22web.org/robin_hood_disney_prince_john_arrives.pdfIn PDF document text
    • http://casser.xyz/unmasking_the_face_on_mars3zpvv.pdfIn PDF document text
    • http://dozujub.22web.org/93063733075.pdfIn PDF document text
    • http://torchland.xyz/6372156800331x5.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/dejadejifomujexambh3tr.pdfIn PDF document text
    • http://milansit.space/61387784414xipb1.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/9a2f4fbc-b613-4bac-9c11-f556f3f2b73f/jijuwutidosete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb76c38-8f89-410b-8cee-c44eea47f320/bontrager_node_2.1_for_sale.pdfIn PDF document text
    • http://baponakiv.epizy.com/vubop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e936637b-07c1-43a2-8d85-e4740b3c473d/childrens_book_plot_ideas.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_969ce206d53e4923b6ae134739aea348.pdf?index=trueIn PDF document text
    • http://finejoluv.rf.gd/52872338392.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_cdc24f5cece8424a9bb9a43a5eb5dbfd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b065b1-f44d-45eb-832e-b5b7d03525ec/how_to_conference_call_on_shoretel_230.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_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 5008 bytes
SHA-256: 2ae4094c8c08c0022435f7258c218a9dc3b7c8aa4fb3a13f8546b519c5c2cc51
font_01_sfnt_off0000fa97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA97 10868 bytes
SHA-256: 8d381d74e3c006182374ba0b16b3ddd0a58f909af0786dc374a1f598bb7921ad

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