Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7905ece047dd81…

MALICIOUS

PDF

68.2 KB Created: 2020-11-13 07:32:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8a0e31cba89f7fcdeac7ef3b565e02bd SHA-1: 7d2c25003ec4542590ad29d51d9bb0189f1a4057 SHA-256: dc7905ece047dd81414e68454268622442bdd7142c389a9763ab8023b03d16b4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detected the file as Pdf.Phishing.Trojan, and ML classification strongly indicates maliciousness. The embedded URLs likely lead to malicious content or phishing pages.

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/aws?utm_term=classification+of+matter+lab+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5faae2adddf2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5fa06e6a2526d.pdfIn PDF document text
    • https://nenojidadexodu.weebly.com/uploads/1/3/4/3/134351563/wesarerakin_lutoxix_nebozobej_xegasema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5f990783b17df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f8ce9d01f11e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f8a32795080e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5fa25b998f9a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f911f384ea3a.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/d908861a-1e3b-4dae-932e-fa7d86a0b51c/university_of_cape_town_prospectus_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab3c2a0-3abc-40cc-b47e-32b8d01a9071/getuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7853a5-f950-4473-8936-f262b635f493/stanford_10_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748d5605-632e-463a-b433-ed10766f09a4/bytes_object_has_no_attribute_encode.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_off0000cd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD60 5324 bytes
SHA-256: 6d24ee01054f2b487411adad8b443cb504fe56977ef8cd8ffb51eacb1107b2d8
font_01_sfnt_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 10596 bytes
SHA-256: 42883150552d41624004ffaa703c6286a0ab0b018c155dd5d47f29b5d04f5bd7

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