Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08132bc69ce65f4…

MALICIOUS

PDF

72.3 KB Created: 2021-02-14 19:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0bad4b596601e938ae5eb9f8c4f79179 SHA-1: b9a056b9d4e998d03728ecd11dcf4220aa28807b SHA-256: c08132bc69ce65f43e9661dcef80d21195cd690dd3881962e877e346301938e0
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on suspicious domains and are likely part of a link farm designed for SEO manipulation. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL redirects to known malicious infrastructure. The presence of multiple PDF links suggests an attempt to drive traffic to potentially harmful content, masquerading as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wix?keyword=chemistry+matters+workbook+answers+pdf In PDF document text
    • https://cdn.sqhk.co/zejizoguzut/daGJjcI/57350791845.pdfIn PDF document text
    • https://witokilufixag.weebly.com/uploads/1/3/4/7/134739393/kulawob_todepobi_rulorokesevo.pdfIn PDF document text
    • https://cdn.sqhk.co/pawapoma/cncjhjd/setonivo.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/2565599.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/fxhcPif/learn_spanish_with_maria_espanol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481400/normal_5fceda3027d8e.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/AXgjShg/sonnys_pizza_bistro.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/09d1a5fec8ba.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/ibjggcf/screen_recorder_windows_8_with_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/ejdjblO/mexibanu.pdfIn PDF document text
    • https://cdn.sqhk.co/tisorobew/hfOogjm/throne_rush_mod_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/vCihRhi/26830735129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimogotewebi.epizy.com/gizunasidudumuwajunuxafen.pdfIn PDF document text
    • http://patupafu.rf.gd/83593838526.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_off0000c6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B0 6384 bytes
SHA-256: 5b10016f2b8d0bd6562dd0adee305f8fbacf04d75055bb1324646ba9541eae5a
font_01_sfnt_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 5552 bytes
SHA-256: f959be7c343e8d34ba3adefb45b6471000e4274e418e82a5bfd4fd3a103d4dfc
font_02_sfnt_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 10648 bytes
SHA-256: f64b50499968927b0374f47dbfe1b27ecf1cd123f02e0bff7705bf2f66f1bca1

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