Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07a336de8da9059…

MALICIOUS

PDF

65.8 KB Created: 2020-11-14 02:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0d7d703b762ccbcb208009de6c84e5a5 SHA-1: e132cf4a647479419fc1164a2adb26f0dd1e5458 SHA-256: b07a336de8da9059d16620ba3067b40bd43b88912d374dac5c46e0c3fc01b6d4
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 heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, with one prominent URL pointing to 'trafffi.ru'. This suggests a phishing or scam attempt to redirect users to malicious content, likely disguised as a download for popular software like 'moviebox apk'. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=moviebox+apk+iphone+6s PDF link annotation
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/2063253.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/9324386.pdfIn PDF document text
    • https://visobugogo.weebly.com/uploads/1/3/4/5/134582963/ff7e34357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d50a03-4aae-464a-961a-1ad15b61def5/xigigulifovux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29663f88-ea16-4f33-94f3-96e66e3790bd/tavusud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34af925f-26b8-4778-bded-04edcaafeaca/65076422794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2061f2-d17b-4eea-a842-efe1ec51b321/losigibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a30d839-1820-4260-8919-b0ef1b358a03/52301155922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45998157-12d1-470f-9365-3dfe857a0d25/vamazux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb815bf-dc7c-4c0a-9989-8667fddb0f46/nilidolageligurejex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9ac3ef-fb86-4cb3-86ea-d6e6e257d188/moratilakapasufuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13046ed-b161-416b-b605-02284a03e1e2/oxford_bookworms_stage_4_download.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_off0000c534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC534 5268 bytes
SHA-256: e61680cd1eddf49a8e70f864790f1fa3a3f14de2338538df32063d18c71ff534
font_01_sfnt_off0000d736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD736 10472 bytes
SHA-256: 0671648803fc4ea88c64563c1cd014f33cdc1e887d720bf71e42e8603fc19004

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