Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1649b428cb5383…

MALICIOUS

PDF

70.2 KB Created: 2020-11-10 04:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6ec2b7cc74362b1d5becef77b31e0ea4 SHA-1: 2404c87e2de64bb5162fa9c1746defafe588411b SHA-256: 9c1649b428cb53835d3aeeff2494cbef01e64c99c559beb24fc915c089921253
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://traffine.ru/strik?keyword=dodge+ram+rumble+bee+specs PDF link annotation
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/rijudadubawif.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/6124692.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/litekuritu.pdfIn PDF document text
    • https://folugaso.weebly.com/uploads/1/3/4/5/134503816/xeliwakikeb_kadovurafole_returuja.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/xakapudakadu/small_catechism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c47cc51-f9f8-437b-afa3-efe6d23c6c14/add_attachment_to.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ancient_egypt_map_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/85122700852.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/chords_and_lyrics_for_how_time_slips_away.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/96811446583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154424b2-6d32-4510-a8ed-d7b0278531ea/social_psychology_textbook_gilovich.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/zixibewuvufegasi.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/how_do_living_things_get_energy_from_glucose.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_off0000d69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69A 5532 bytes
SHA-256: 75afdfede5eccbff54dbd12b58c3b2b4484464a076b84783a77bd1f0574d209b
font_01_sfnt_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 10304 bytes
SHA-256: 00ed2be282ead387d802b3cbbda08ba84e8c679212f60f8ff7c5e2124d337878

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