Malicious PDF — malware analysis report

Static analysis result for SHA-256 432c20495a9d87b1…

MALICIOUS

PDF

65.6 KB Created: 2020-12-18 01:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 594d8c1b66c1df387e677f73bd550a52 SHA-1: be31c80946d5761a1557bb57983598bc25405e52 SHA-256: 432c20495a9d87b166989a43a80703b73f7988b452cd2304c19b1377ffd9dc6d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. The document body, though heavily obfuscated, suggests it is masquerading as a financial report to entice users to click on the embedded URLs. The presence of numerous external links, many pointing to Weebly domains, indicates a likely link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=frasers+property+annual+report+2019 PDF link annotation
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/1749971.pdfIn PDF document text
    • https://fotobuwab.weebly.com/uploads/1/3/4/3/134368258/pizoxixuti_gofisajelu.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/vowewu_julutexigire_fufasevodoxag.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/bbba2.pdfIn PDF document text
    • https://nakakikixug.weebly.com/uploads/1/3/4/4/134490848/rerepovanafuni.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/mojawonup-sinaj-midunolubixuni.pdfIn PDF document text
    • https://wavutokemik.weebly.com/uploads/1/3/4/3/134309613/wibejepinawido.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3d3f7084698658e709650/t/5fce4f3705ddc9599d5157f3/1607356217173/xujadukelikatalun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c697bda9c57a97c4683c/t/5fc78c8f93ad1a48121f6a03/1606913167609/69133604695.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e15d7d0c8f249d40b1da/t/5fc319d418e72e5fdb3dd442/1606621657867/the_bolles_school_careers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ef6e61-9a59-4e1f-a76e-ceefd25aafa6/undermount_sink_bracket_kit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c0f59955c744b53accb6/t/5fc1551508845d0924bc2afb/1606505750137/2000s_tv_quiz_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cbc120-568e-4ae3-8fa9-13d8a4fab5db/9726204654.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_off0000c574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC574 5352 bytes
SHA-256: 254f732e04fa335fdd72769279900bbb1c317f05bd21055c489d33e7d233db34
font_01_sfnt_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 9984 bytes
SHA-256: 0287d88c65078942fcbecf9e83e4742f2f9af1d00ffdfabe4a3335ffc330609b

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