Malicious PDF — malware analysis report

Static analysis result for SHA-256 e265daf73095fd3d…

MALICIOUS

PDF

71.0 KB Created: 2020-11-11 06:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5be58d05bcddf479a89a849c74963c47 SHA-1: 145b9b699eca2138e09a762d280d2edf44fa3a61 SHA-256: e265daf73095fd3dc9f804c298a8d1c9716910ad736e9ca41fe1325d98d8c4af
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 0.9998

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/123?keyword=auto+answer+video+calls+android PDF link annotation
    • https://xerekabixedil.weebly.com/uploads/1/3/4/6/134684256/xutolebajumures.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f8b81b9e82b5.pdfIn PDF document text
    • https://tiludidiliduw.weebly.com/uploads/1/3/4/3/134385670/0a211498d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f8921cef2173.pdfIn PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/561636ba223ad1d.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/natinagogagibuman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f87814894e1f.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/5f80650b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lanorolowu/caterpillar_993k_specifications.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/zofuresixozezuja.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/amoretti_sonnet_79.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb581b0b-cbd8-4820-95a3-224d3a30a624/zinavefunitakewimojap.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/18542882574.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/hello_neighbor_game_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/72387095547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a312ab2-e2a8-4bac-9a4d-ed5dd79da408/94511833013.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD2 4956 bytes
SHA-256: 2fac29076d10d1b346e7f665d77cf7db4fa349b0b6ede9eed3ffc1d83516c8de
font_01_sfnt_off0000dbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 10884 bytes
SHA-256: f86c40a4a3325f8e50c6ae7d0811bc7e4f2ea886bf5804bc83c52b6f8737d1d1
font_02_sfnt_off000100de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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