Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c99fab6e4d361b…

MALICIOUS

PDF

81.5 KB Created: 2021-04-08 01:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 427b8b87a080140765413c46af214e4b SHA-1: 28166e2c850e436652e7fa9cbd809a1f7574850c SHA-256: f7c99fab6e4d361b4e124a38b4b4dd8dcd95efa18f79be0208e211b7405e1b25
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the nature of the link farm indicate an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=is+war+room+based+on+a+book PDF link annotation
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/a6e3c48b.pdfIn PDF document text
    • http://fortuneo.best/59910445578gqtf5.pdfIn PDF document text
    • http://fisutef.iblogger.org/77785401256.pdfIn PDF document text
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/2932761.pdfIn PDF document text
    • http://antonioita.fun/realidades_2_capitulo_2a-_6_answersbrth3.pdfIn PDF document text
    • http://lesantyqas.online/52329367546jl28c.pdfIn PDF document text
    • http://geleostone.online/genie_intellicode_keypad_setupd5v06.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/6950460377.pdfIn PDF document text
    • http://botefin.medianewsonline.com/break_even_analysis_example.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://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_aca54339bec34896bcd6992e5bf13f48.pdf?index=trueIn PDF document text
    • http://wirowobizofox.epizy.com/periodontitis_and_diabetes_a_two_way_relationship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5648a3d-2700-405c-b83b-fe72b202b4c9/74359451748.pdfIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_8adfe1c7ec074108a395717a0e64ed98.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_386000c653854e8ab780a493fba90880.pdf?index=trueIn PDF document text
    • http://magixek.rf.gd/physical_regions_of_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fde4a3e-49a1-42db-b2f8-d6a562c179ab/xubexixorepugewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2463c616-31e9-4ead-9c7d-acff9458603c/2001_mercury_225_efi_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d9b1aa-ea90-4b4a-b353-69ff7aa78e67/what_do_the_symbols_on_pokemon_cards_mean.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_6566222845c446ca809d101ba7300857.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b879b5e-25ae-4bb7-b9a6-db1d21efa898/how_to_set_up_total_gym_xtreme.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/kozegugu.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_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 4832 bytes
SHA-256: db707ca49f8676fdc0083f0ce650e6d63fd398314a9460b56f2c0708b0f58348
font_01_sfnt_off00010651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 10820 bytes
SHA-256: e5a9cafb0330b00d21aae9d5b56e3d2181d01b78332edf7ee8e218089c4212b5
font_02_sfnt_off00012a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71