Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61394297b7450e7…

MALICIOUS

PDF

47.9 KB Created: 2020-11-07 22:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 662e9d477feddba6cb568b3c77e1bbdb SHA-1: 94b13ee4317270b94dc1873b8c0a7b57d1758adf SHA-256: c61394297b7450e7eb448c849513a91b8af18f818d7a64878905f14fe099c763
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially obfuscated, includes text related to a '2019 - 2020 calendar printable' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector URL indicates an attempt to lead the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=2019+-+2020+calendar+printable In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8721894f0ed.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
    • https://s3.amazonaws.com/mitakajazum/alpha_omega_car_seat_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/34242557995.pdfIn PDF document text
    • https://fujajonip.files.wordpress.com/2020/11/approaches_to_conflict_management_in_the_workplace.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/bizegaluveboriterafalam.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/autodesk_recap_pro_tutorial.pdfIn PDF document text
    • https://mopuxupu.files.wordpress.com/2020/11/19764246295.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/pathophysiology_of_diabetes_mellitus_2017.pdfIn PDF document text
    • https://wiligudunu.files.wordpress.com/2020/11/flagellation_in_algae.pdfIn PDF document text
    • https://pubosepiko.files.wordpress.com/2020/11/79253018913.pdfIn PDF document text
    • https://xejuritumar.files.wordpress.com/2020/11/fagatimuveweralokebonunag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ef9b58-fa1c-44d0-b575-ee4ce0da7b9c/velas_japonesas_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/looking_inside_cells_worksheet_answers.pdfIn PDF document text
    • https://forakufu.files.wordpress.com/2020/11/cengage_mathematics_coordinate_geometry.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713A 5128 bytes
SHA-256: 9f6ff385bf9fb42d00802b7c3e1538003dca96914a79f74c86a5ef660cca2a95
font_01_sfnt_off0000829e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829E 9808 bytes
SHA-256: c03f3121520b9b8fee292915370c4c64b243ace5e119ec55323f6a495bf09bbd
font_02_sfnt_off0000a440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA440 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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