Malicious PDF — malware analysis report

Static analysis result for SHA-256 1194da7f9f526086…

MALICIOUS

PDF

80.1 KB Created: 2021-03-21 01:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdba3626bbd34c440947fdbf8395de95 SHA-1: 89052ab50e21a193d5db7761e7f84c528787e648 SHA-256: 1194da7f9f526086573fbce306989f7a92cb22350346a2d087614e5efb4f3a3a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=what+is+the+purpose+of+narrative+writing
    • https://cdn-cms.f-static.net/uploads/4404983/normal_604aeb42abf09.pdf
    • https://cdn.sqhk.co/fiporalisu/H6gGjh6/basic_business_plan_format.pdf
    • https://cdn.sqhk.co/xekemini/SgigiHU/10593124877.pdf
    • https://cdn-cms.f-static.net/uploads/4401712/normal_603bd11f3ff65.pdf
    • https://cdn.sqhk.co/xaderipamuva/NtjbWig/52402625371.pdf
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/4611671.pdf
    • https://kavikazu.weebly.com/uploads/1/3/5/3/135392310/8dbeda054721f6.pdf
    • https://cdn.sqhk.co/majumoros/ibjaKCQ/89520967080.pdf
    • https://gutinevar.weebly.com/uploads/1/3/4/6/134611255/218525.pdf
    • https://duwodalufe.weebly.com/uploads/1/3/3/9/133997525/luvik_neluxu_sirabenasujupa.pdf
    • https://cdn-cms.f-static.net/uploads/4379626/normal_603ac859915bb.pdf
    • https://cdn.sqhk.co/jutafegobexe/jcIgfhf/vavawuwomexudo.pdf
    • https://cdn.sqhk.co/vixemujomu/hePjejc/14505926881.pdf
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/b6c7258991c608e.pdf
    • https://cdn.sqhk.co/pabelewexo/9jgXgl9/expert_guide_for_castle_clash.pdf
    • https://cdn-cms.f-static.net/uploads/4413719/normal_6047e339b8c83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_015e396345b547daa05a4a3752eedb3e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a18a0972-4aad-428a-8a6d-03ed795029b3/contrato_de_arrendamiento_minerva_para_descargar.pdf
    • https://uploads.strikinglycdn.com/files/78b2fd6c-daf0-4ec2-af16-7c1f1fa788ca/26401329416.pdf
    • https://uploads.strikinglycdn.com/files/34f3b64d-f03f-4dcd-91a2-2cd88aa36e27/epson_v600_vs._epson_v800_photo_scanner.pdf
    • https://uploads.strikinglycdn.com/files/303d52cd-3f05-4ee3-915e-3e7d85eaa29d/tones_in_poetry.pdf
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_69fcc2bafc8f4a2986e7613244b2c0af.pdf?index=true
    • https://uploads.strikinglycdn.com/files/01b5c939-2c68-4024-bfde-7911a8cebe63/does_thermaltake_make_good_power_supplies.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc8.bin
b691f0d3c7051826f4b702aa2a5aeea39ecbdda0200fd2200c06d43c331a1e9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC8 5296 bytes
font_01_sfnt_off00010de8.bin
eedd6aa3f643da6eca4e71c0107664b477bd4e4d0e26d360683cebd8b62e0efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 10732 bytes