Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40f0a7c28df0ba7…

MALICIOUS

PDF

72.1 KB Created: 2020-12-16 11:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c5617924dce852a7467993e5b06e0bbd SHA-1: b0c5527203399d6a1820ebe79e786c0d55d99a62 SHA-256: d40f0a7c28df0ba757c7758d4081698110aee0b33011d63a76262787796d2979
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 0.9997

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
  • 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=dog+care+tc05+manual PDF link annotation
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/76b2ca02e07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f9d98443f82e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_5f9eefe124594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450160/normal_5fc702ec10919.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/871936b6-2b87-413f-888a-9db10e7ad194/83347316109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f88ed99-50d2-46d9-8340-e83248f08bf0/7047256209.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57d1d5687f52b6ba02c69/t/5fd1e737880fa23343d6c6ef/1607591736541/dufubirudizakajofan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55116f1a-db20-4e8a-bb9e-1e5282403153/15383882367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb60e10-9242-4934-8f3b-fe1495594a12/nunezinoruvixiperanamisaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c576ab12-d5b3-4250-9625-8d0a4ebcb421/nioh_smithing_text_farming.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/xurezesowabeviwanazadowed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7fbe9fc3622d5227cd2/t/5fc3b474173fb5383b14575a/1606661237891/gifaluzowurageselogebifiz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5208 bytes
SHA-256: 793b4a60a251e1e5811d7cbb7ada7efdb91a7a97876e24b4d4f16cc667180e90
font_01_sfnt_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 10504 bytes
SHA-256: 57cada7fa42dbc0e92e07281b0248c6d88cf9a0b94c3b769670ad6c5f09de6f0

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