Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff2d3b910603942…

MALICIOUS

PDF

76.8 KB Created: 2020-11-22 11:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f7ebc1c365fc82d7188fac4188cb8b46 SHA-1: 1ce13f3dc9680f77b6aca612049558d2539a712c SHA-256: 9ff2d3b910603942c9ebc2b23369e497b2ecba6f354561675eaba0ac01a04cd4
116 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a callback phishing lure, prompting the user to call a phone number for a fraudulent purpose. The embedded URL `https://trafftec.ru/123?utm_term=how+to+delete+old+ziprecruiter+account` likely leads to further malicious content or phishing pages. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafftec.ru/123?utm_term=how+to+delete+old+ziprecruiter+account PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454544/normal_5fb03954eb86b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f90e821b7912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5f95d83b87258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_5faae47b42b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fa9c940a7a41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f8a263a057db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f8a5e1043389.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/vuraradaso/acer_aspire_e_15_es-576-392h_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/dirogorokinamexep.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/45743710987.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/sea_of_thieves_creator_crew_rewards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8416a1-6a25-4ad0-b39d-4725c49c2d65/pulling_down_strongholds_derek_princ.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AE 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 4872 bytes
SHA-256: 2463a00a51722531eced09c4aff37dd5bf38da2837b523b823580851229f7f11
font_02_sfnt_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 1832 bytes
SHA-256: 5ffaefc3e0557b00b782eb4eaf68b09450f886f42d7609d137eb5be35b86f827
font_03_sfnt_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 11200 bytes
SHA-256: 47d91c3c4875d549a2e39611a5f5de38c1d56841273c8f2f20a6b2755ca48118
font_04_sfnt_off0001175f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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