Malicious PDF — malware analysis report

Static analysis result for SHA-256 003f8180b65c1806…

MALICIOUS

PDF

58.5 KB Created: 2020-11-13 23:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d28558d46133d047033fff8becb21f09 SHA-1: d257c99fd7662079ca78322f2912d4d515b9be3e SHA-256: 003f8180b65c18065e7c24084aab0742dce60c0a312aa93fc95bd3b06e9df224
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 0.9996

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://traffnew.ru/123?utm_term=lord+of+the+rings+first+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5fa6eaffa0740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fa29947b79ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f926159ea7e2.pdfIn PDF document text
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/limevixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_5f9642080a556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_5fa4120ba3819.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/fomeru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f92fb886556a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fae0c29b52e8.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/tesotiwapax/linesatidapuvubej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a8192f-7f40-4079-8ee2-31dd49787b0e/48127170473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e7749d-00fb-4dda-9492-2c205f27e1a2/medinunenizevewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4ab802-5419-4da6-b39d-ec32789dec0d/kinugogozelefonogufasob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d972ace-0503-4a97-a260-0bd75e522e59/tovurixixularemakedopomuz.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/dell_1901fp_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beda6c4d-334c-4886-940c-70061bc43b9b/buwapifidonepejezabudevu.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_off0000abc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABC7 5204 bytes
SHA-256: 62743f887954940c868d81f0d5ad09da99d0023d50b86a9fdd983c61db61faf3
font_01_sfnt_off0000bd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7C 9244 bytes
SHA-256: 7d48144618019eb2083866208f11ab6b78942f648ea9c4ab408cc745a68ade1e

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