Malicious PDF — malware analysis report

Static analysis result for SHA-256 328fdc1ee65a248f…

MALICIOUS

PDF

69.1 KB Created: 2020-11-13 14:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dea64c3e798c7c609d1080315d1ce54e SHA-1: e4acf819011c542898ae46f78622dcf00e1ec111 SHA-256: 328fdc1ee65a248feb60e8cf6df1e369c84ef2bf25055c38936a01e83d1c81c3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to Weebly and S3 domains, suggesting a link farm or distribution network. The primary malicious URL identified is trafffe.ru, which is likely used to host a secondary payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/strik?utm_term=waiting+for+the+rain+book PDF link annotation
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/f718c26b91.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/zebitajoze_lamadamu.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/13b897d65df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446034/normal_5faab2e0d2ed4.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/bcb576e4.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/3f4341bdb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5fa3a2c640563.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/sukobogixe/tofuxopej.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/words_that_begin_with_phy.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zenavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de239cf6-06a7-4b35-aaf5-84869aee587d/5644910427.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/leganuvimifowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/919d4dab-16d5-4d56-b5f9-b6fd9aa8514a/the_5_languages_of_appreciation_in_t.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/plant_taxonomy_and_biosystematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e1d81b-b37d-4075-bd28-daf44590b507/44512883377.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/audi_a4_2010_user_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 5036 bytes
SHA-256: af4e5c6b2e2afa5529c93cfd1d573f2111aea48168e672d812f7023b453aad91
font_01_sfnt_off0000e43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43F 10548 bytes
SHA-256: 6e9c109f346a649cd5568b714c50042b62c271d0f0e36000519acf784644bc22

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