Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e823fedf31dfb1…

MALICIOUS

PDF

33.3 KB Created: 2020-11-08 12:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cea1ca8686fe9ecdff5e9d7132ad85ff SHA-1: 908a2cad957849f045227eed635607e5f331cf7c SHA-256: 69e823fedf31dfb1f989c313e8d27db14f316794ebf979c65c5d77ce3cfd5c5e
66 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 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 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/aws?keyword=650+sub+zero+service+manual PDF link annotation
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/dibexujuzidi-zatebagisin.pdfIn PDF document text
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/tewulijunekitifebi.pdfIn PDF document text
    • https://vaputonusodi.weebly.com/uploads/1/3/4/4/134493057/7310636.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/webobizo.pdfIn PDF document text
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/fce372.pdfIn PDF document text
    • https://fegibaja.weebly.com/uploads/1/3/4/3/134305779/zoduxikodanekediru.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/b93e3738-6e1b-4a42-a8fe-d001d7af59c7/save_google_doc_as_in_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80059c32-bcfa-47f2-8c43-cfbe824fdb3b/business_model_generation_osterwalder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9533460d-1923-431b-8eac-65c489524d55/penadutef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c00195-6eab-479c-9917-f1de6054fdd9/groove_is_in_the_heart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c3e00c-d28c-473b-ad72-42b8d4b692b4/lanarebuxajumotinif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48ecc3d-3385-49bd-8a12-a436c4e56f0d/hra_new_britain_ct.pdfIn PDF document text
    • https://tibepitetuj.files.wordpress.com/2020/11/vuwoxanaxower.pdfIn PDF document text
    • https://mipofasena.files.wordpress.com/2020/11/bemotipekivijij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16f6e3b-e108-4294-b2e7-5afcb4bcdf55/20094181617.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_off00004599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4599 5520 bytes
SHA-256: b1ab08909c344731645ad1aa7043f72e0095517eed7d5309bad700a63527daef
font_01_sfnt_off00005852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5852 8948 bytes
SHA-256: 81682ed1b8976cd72d2fd11758ce5a15feb8400fb7745455231266971a41b138

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