Malicious PDF — malware analysis report

Static analysis result for SHA-256 6960073e843faf21…

MALICIOUS

PDF

93.8 KB Created: 2020-12-28 14:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 17ffb43f06029f107a2c8fb96d5e9c75 SHA-1: 958f77218b5a6968df2a7704751edbd3541bc1ed SHA-256: 6960073e843faf213b94dfd454b7a400906e1143a6e80fb6b283935e0273e174
156 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, indicating a link farm or phishing attempt. The primary URL, 'https://trafficel.ru/123?utm_term=igbo+proverbs+in+things+fall+apart', suggests a lure related to the book 'Things Fall Apart'. The presence of numerous PDF links, including one pointing to 'gta_5_cheats_ps4_unlimited_money_cell_phone.pdf', further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=igbo+proverbs+in+things+fall+apart PDF link annotation
    • https://cdn.sqhk.co/sabeludejem/roCOgeW/gta_5_cheats_ps4_unlimited_money_cell_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f909b6c1b477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5f9ca5426a561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5fdb24c18827b.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/jbghjeY/thoroughly_meaning_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fcf0746666f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_5fad3f11ae52f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5f90fa272be0a.pdfIn PDF document text
    • https://girejegi.weebly.com/uploads/1/3/4/4/134490844/vutuxikores.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiduro/ardisia_elliptica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414fb585-374e-4370-9673-2ca9abfabeae/rugojedefidu.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/adverse_event_reporting_clinical_trials.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
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12408 5300 bytes
SHA-256: 4fefa02340ecb753979d9a8dc2aaa4e446da1012003070a53394bc9785ee0ff2
font_01_sfnt_off000135d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D7 6616 bytes
SHA-256: f358dd5fb58072b7bf52ca8ff1c477d2aaf556c83be716c4e755bdc2198c08f9
font_02_sfnt_off0001464d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464D 10340 bytes
SHA-256: 8b9b57db521dfcf778b9d163ca2419ab89449608dc1ec000b6638f79e323743e

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