Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dbe710a3ce87a5…

MALICIOUS

PDF

71.4 KB Created: 2020-11-19 04:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: deb0531a783eaa1b6721b1eedbaeacf4 SHA-1: 53a5f835f35391c075e912aa5df31fe22f13dcaa SHA-256: 17dbe710a3ce87a5be2f23a2e7afd7fcfee2b1228e27fc51b24d333bfa78e1e6
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-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://trafftec.ru/strik?utm_term=breaking+bad+season+2+episode+12 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f903d479287a.pdfIn PDF document text
    • https://diboboxu.weebly.com/uploads/1/3/4/3/134330346/4488539.pdfIn PDF document text
    • https://wokewimafagi.weebly.com/uploads/1/3/4/5/134598023/74842.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/dobesogum/73838471564.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/xiwenuporitukatilanitenut.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/instagram_brand_guidelines_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/cycling_cap_pattern_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/forces_of_evolution_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/interesting_facts_about_st_cecilia.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/32134605111.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/capacitive_coupling_ethernet_transceivers_without_using_transformers.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/the_evil_within_2_platinum_trophy_guide.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_off0000cd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 5240 bytes
SHA-256: ae4bd72b29365152365e4ad6c96745c6388466813a546656f6fbf783d6638d07
font_01_sfnt_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 10268 bytes
SHA-256: c9fb7191d9a8c2a792e6e84489ac8022bc601ac746c8146584cfb3d4a6a9b962
font_02_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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