Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c2e82491b3d9ce…

MALICIOUS

PDF

68.6 KB Created: 2020-11-26 11:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6c16573a059e9a37b1b1f4b9f0984d09 SHA-1: 103781484cfb09ac68173be8cfd9657d4cf17080 SHA-256: b0c2e82491b3d9ce87fa5496c82cd7da1bb7dfcaf350e07221c87a202d4dffab
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/123?utm_term=hope+for+the+flowers+theme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481280/normal_5fad960015cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_5fbee0e7d3c81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5f9b07b7b7eca.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.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/zosevid/american_bully_breeders_arizona.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/pitch_class_set_inversion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6304f9b7-891e-4d85-a3a0-e06b981efe78/19613418508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe236c62-d0b6-4db7-99be-0d83ce75fe4c/56108237499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14435f8-1c1e-471b-b204-cfc8e85c0205/gotokonixokap.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/mitalukuzonu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/tendinitis_aquiliana_tratamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571f6912-fb3b-4a8a-bfd0-c1b30d4bc4b2/63733607084.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/rage_form_sora_khux.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_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 4984 bytes
SHA-256: 98e1587deca37e105019c4212f9af3ea992c717872d5e0b3bdcdd607fe10d281
font_01_sfnt_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 10520 bytes
SHA-256: 8410b08ff77ac7baa26e5e891116a1ea4700cd31e735d88a0bbb03bdeb90f59a

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