Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea1713b97edadcc…

MALICIOUS

PDF

71.1 KB Created: 2020-11-21 20:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 17c04ec1329e74b81a7cf42044453543 SHA-1: 94961afcaa5e9a04d9602fb8073de46691db5764 SHA-256: bea1713b97edadcc1941e20b5c4ea12b465002cbfba2494ea36b2b2f77e86059
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous links to external websites, including a known malicious redirector, suggesting it is part of a phishing or malware distribution campaign. The heuristic firings indicate the PDF is designed to link to a large number of external resources, potentially for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=photoshop+templates+for+resume+free In PDF document text
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/bf78a384be7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f9369d7de6fd.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/xanebavifamopez/properties_of_axiomatic_system.pdfIn PDF document text
    • https://s3.amazonaws.com/texifaxepag/icelandic_bind_off_purlwise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0ff6dd-e529-40e5-b6d1-ca5caf42efac/vudigewoxabelirepil.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/30859613353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4007b9-5f14-40ba-8eea-4c7f694271ad/cinema_box_apk_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c1346e-354b-424f-aa0e-cbf91725320c/sporting_times_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e5363e-3d6b-4026-99a7-7bcf25352dfd/toloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553af09a-dfbd-4cae-a9d0-54a64d3b9c05/fikobuvigabiwuteket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bff9cf3-9d91-4d45-822e-40823952259c/office_2007_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00c4161-6d1f-4e23-a14e-b84cf4476735/20213537434.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_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 5144 bytes
SHA-256: 264022ff337026135fb7ca1a78950671970ffa20ac4d556e8b2a885923d4b2b6
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 10876 bytes
SHA-256: 81c00abac55eced5e179066c300b027b7e4fe523d3d9d3127ab184a9626ecf21

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