Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bb3042efd9140c…

MALICIOUS

PDF

62.4 KB Created: 2020-11-26 05:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f34c062afedcfee612d678221e92bb55 SHA-1: ef587f8489753ab5593ff38e0164f8b49b0efba0 SHA-256: e7bb3042efd9140c919e324f2cd8c7eff7660179f913c97a7f99bf27a3ec9565
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'trafffe.ru', which is flagged as suspicious. While the document body is heavily obfuscated, the presence of a link farm and the ClamAV detection strongly suggest a malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=24+volt+ride+on PDF link annotation
    • https://reruwezoketa.weebly.com/uploads/1/3/4/5/134503250/1524288.pdfIn PDF document text
    • https://xelemurefitarag.weebly.com/uploads/1/3/4/6/134601467/f85ee0f.pdfIn PDF document text
    • https://xelenupexom.weebly.com/uploads/1/3/4/4/134480667/baguki-jodemasemex-lobalulub.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/b957d646-b005-4118-b851-78a45004ebc6/95140387643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44a8bc5-8ca8-40fc-82d9-95fcce178fc9/xbox_live_gold_codes_generator_no_survey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bb5754-e90e-40c1-9671-5e4667c5501e/43426727606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762e2283-0ad4-42ff-ad91-1c5b489e72d1/50225722554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a7ec7bf-49ad-4c52-8593-f562c282ae93/kokeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a1b3c0-0706-49bd-84f0-eb581c5a5d85/26893843786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638a4f86-c634-40ea-a537-096fa8cdf908/prescott27s_microbiology_test_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f21b8f-4bbf-4e69-85cf-dbefcc7794bf/225253125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3881932f-8e7e-4be3-8f34-b23dfe78b083/dilemas_morales_ejemplos_cortos.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_off0000babf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABF 4616 bytes
SHA-256: 015a3c058b5a0cf3fb912280db37b33d6524c176d819db9eee6f1537bb9cd7f0
font_01_sfnt_off0000ca8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8B 10204 bytes
SHA-256: 125d238e6054aee7f618ce7460fc2732e55e77ed59ceb3fa3dd58ae2c215bb55

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