Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61ad6aab7f82579…

MALICIOUS

PDF

85.4 KB Created: 2020-11-22 20:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 69f42e857b2063877c50052f8a783074 SHA-1: b9298fed661c1587b620e52a025e3d1b6518a882 SHA-256: e61ad6aab7f82579095aa3902cd92f3cfbd15941e72597904ca006f22b116989
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 0.9996

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://traffnew.ru/123?utm_term=illustrator+perspective+grid+shortcuts PDF link annotation
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/5403890.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/4178201.pdfIn PDF document text
    • https://linezeludamaxen.weebly.com/uploads/1/3/4/3/134340908/pibufurotifab.pdfIn PDF document text
    • https://lazetulomobepi.weebly.com/uploads/1/3/4/3/134326787/3b1e43.pdfIn PDF document text
    • https://zamelati.weebly.com/uploads/1/3/4/6/134652334/pulaweti_dofigepudebik.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://uploads.strikinglycdn.com/files/1fc33535-74fd-436e-8789-a404b116249d/husqvarna_372xp_x_torq_workshop_manu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/sistema_circulatorio_para_nios_de_tercero_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d4f0a4-6fee-401a-8c3d-f53912f1a5dd/17264852624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede46f14-1bbc-4883-8f58-15899411e685/32736978985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca11112d-4281-4599-a9b2-024fc4abfe7b/elements_of_applied_bifurcation_theory_kuznetsov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1060ed4-a57b-4379-afe1-e8ee52ffc25b/how_to_make_a_voodoo_doll_to_control_someone.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/early_bronco_horn_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a030da-66f8-4483-8625-dd61a971c5b5/physics_of_the_atmosphere_and_climate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73aaa75-dda7-47ac-9677-aec46a33334d/madati.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 5108 bytes
SHA-256: 5a688699c5cea9622c09b8ab751be776d2fe4e2da7414621a8456c102f935340
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 15152 bytes
SHA-256: 6c4f6f06957213d2828464854d0fbb886333f8cff74ab53dea4d0377c365ff1c
font_02_sfnt_off000124f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F2 16208 bytes
SHA-256: 81cf4ca088b0a954c3d6a2f27ba20ae197ed0c571ed908dc1f999f24e59e0a47
font_03_sfnt_off00013a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A28 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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