Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f692e0a8ffc0dbb…

MALICIOUS

PDF

41.5 KB Created: 2020-11-03 06:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 040786122dc5c39f00d39692f39eb74c SHA-1: b89ea3f0b5f753e5ccda48fc552bef9f8558028f SHA-256: 6f692e0a8ffc0dbbdc801922833f1a3b28b7231c90ab906b5a43937a7e1b264e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be to direct users to potentially harmful websites through a link farm, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/123?keyword=jan+ernst+matzeliger In PDF document text
    • https://fujimerikav.weebly.com/uploads/1/3/4/3/134307110/lezogenurew-sipokezefib-misipezi-dugurenazagol.pdfIn PDF document text
    • https://zozufawagizawag.weebly.com/uploads/1/3/4/4/134454621/vagafubulijujinife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd21067-d04c-4f62-99bc-c4c33d7b2d79/lugaluvexinijabum.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/benton_high_school_103.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/vujokamir.pdfIn PDF document text
    • https://s3.amazonaws.com/jolufozo/wefonuvexaxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8109/7631/files/fundamental_counting_principles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/30149037074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40feee84-53f4-4266-9aac-60aaad6fd46e/52353094293.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/trinity_high_school_basketball_coach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/2115/3437/files/mikegex.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/animismo_e_espiritismo_alexandre_aksakof.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/cards_against_humanity_uk_version.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_off000064b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B6 5044 bytes
SHA-256: 68dd6db508c2720130e9a3282915f6a710350fffbea1c400697acc7e7a5ac698
font_01_sfnt_off000075cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 10400 bytes
SHA-256: 6e761d13a1b778dc7339af863545435e6502fbfeb61959d604353d099d3756f6

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