Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b2562655b618e0…

MALICIOUS

PDF

78.7 KB Created: 2020-11-28 21:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9703b21d42c031b44d393c336fbc6f4c SHA-1: 9148d4b58055e522a42a5f6699d385bbf1d0082f SHA-256: 08b2562655b618e0a9f47a93e4e434ca7a5202243e4c50e83bbdb93bbd927018
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=adt+plugin+eclipse In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/nugedub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486042/normal_5fc15a330e807.pdfIn PDF document text
    • https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/lozoxokajijumak-tokanadevaturig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493200/normal_5fc0d29740556.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/tojabixefova/elf_last_names_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/daily_attendance_record_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e503db-f863-4fb4-8079-f32c1f62692e/black_screen_personalized_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/30260244494.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/virapetod.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/gidadomufam.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_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 4696 bytes
SHA-256: 4c78dac3c4c6b7776c49b3746738bda0dbce5b414c6569f132d14a1c6ce1d553
font_01_sfnt_off0000fc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1F 10532 bytes
SHA-256: c54aa958e4031d679c685110525722cdffa87df27988d612f0ee5c44605d587d
font_02_sfnt_off0001202f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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