Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac708629cb5185a…

MALICIOUS

PDF

83.9 KB Created: 2020-12-26 08:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8060dcdaddedb1facb39b1ab00b3c123 SHA-1: f3528c8e7b7c5529b702adbceb2a4c5cdffc8dc5 SHA-256: 7ac708629cb5185aa557a50d4199d1836fe8dd436278daad68bfd2a18bd3b4cb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'trafftec.ru', which is suspicious. While no scripts were directly extracted, the nature of the link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to redirect users to potentially harmful content or phishing sites.

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://trafftec.ru/strik?utm_term=cat+warner+famous+birthdays PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448733/normal_5fa0db5d2ba56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_5fa540e46f069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f8dda21d4042.pdfIn PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/a716d79fcc5.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/9550457.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/rivazixexuguri/mv_twice_fancy_dance_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/ctet_solved_question_paper_2018_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/assured_shorthold_tenancy_deposit_prescribed_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/48448764844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c468f437-1861-49c1-9451-7d24ed939dde/bexaja.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/varokemijubezewudonam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3da747b-eaae-4a5a-b0ac-5b5ad78fc977/3783784190.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_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 5352 bytes
SHA-256: acee4b5c559d59ddfe3ff119d7c613c6bd9401d8a2db73f1e7363bba2b4c7066
font_01_sfnt_off00011cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD8 11328 bytes
SHA-256: 94de857e414447dc55fcb4ddb84e089f2c5bc7ac125077f2be1eccfd2fd53c43

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