Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e2a3cc8de4df8c…

MALICIOUS

PDF

68.7 KB Created: 2020-11-24 07:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5970d9135e2339701f56ed595c3a30ab SHA-1: 1a7fe4457b1277368dfe08dce69b119fb48cfe37 SHA-256: 72e2a3cc8de4df8ce7d951e6b77374d519d1f223f7413ea31dd9d32f5740eae4
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://traffnew.ru/aws?utm_term=outlander+season+2+episodes+guide PDF link annotation
    • https://virukuzababije.weebly.com/uploads/1/3/4/3/134350100/948783.pdfIn PDF document text
    • https://kirugivedipabaw.weebly.com/uploads/1/3/4/4/134464293/wuwowokakig.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/sirovimaz.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/wopari/history_ia_reflection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3846a8e-e10c-4bf5-9571-f633e195119a/koxaruxujag.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/marakepo.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/30621855050.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/peravowes.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/killington_vermont_seasonal_rental_homes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec03e375-b469-447a-bc0a-6e5fc58c5e12/kearn_baggenstos_corn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af5b4ed-723b-4551-b5e6-6842cdcc226f/pain_abdomen_nursing_care_plan_for_abdominal_pain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a925e3-31f9-4370-b851-cc8776b4461a/radezagokanezitis.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/allu_arjun_images_wallpaper.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_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 5288 bytes
SHA-256: fa9530c43162dbb30d90887882bd7ce67ef477597f2fdfc4e831652a27276e8a
font_01_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 10320 bytes
SHA-256: a8744b341cfcf922899ba12cd93755cf9316285e4f6ff8fe17291b5763da3909

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