Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c2e14a953ea7cf…

MALICIOUS

PDF

71.8 KB Created: 2021-01-02 03:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2d2771be6e9eae8c47b013c7dab783db SHA-1: 8e1c81cfd50232cf43f156cef1e5ff70d53e4c08 SHA-256: 56c2e14a953ea7cf634ae3917774148c046eae56a8c5372f9f2ed55d359d0774
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on dynamic DNS services or free hosting platforms, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://traffnew.ru/123?utm_term=lawn+care+contract+terms+and+conditions PDF link annotation
    • https://woloxujujesif.weebly.com/uploads/1/3/4/7/134716607/8688260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fccffbf855ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5f9a3690325aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445888/normal_5f9d21b6956cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fae2b5e80350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fd627a4b674b.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/bjbLjgc/lajixemev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5fd1fb26ebd85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5f8ce5f19123f.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/lopadivupudexa/36932283322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca7a2b4-de88-4fb9-bee9-dd107f0efdf0/xenanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22765d10-331a-4ab7-924d-a32d4a29156f/wgt_golf_hacks_credits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5943e71c-af2a-4a4d-829b-330616c430ab/fobejogojujikazesep.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/loruz.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_off0000dcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF4 5084 bytes
SHA-256: b6bca02da63baa2426ed68ca2e9237e442de7ef5fb4b543f3a1bd7417ea5b023
font_01_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 10668 bytes
SHA-256: c720334971528c82350b1d94864723d6cebde68df097bc657ed276058aef45c5

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