Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c2ac913b6152cc…

MALICIOUS

PDF

85.6 KB Created: 2021-03-20 23:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f19f6f9a41a4aefa1e74fafe26d47566 SHA-1: 9f09bfab43db81237cc035a859c5b16d89de7e24 SHA-256: 92c2ac913b6152cc5ded23b09680d4b54cdfe2ca0ba4cb370edfb02950d3ea6d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/award?keyword=ceremonial+magic+israel+regardie+pdf PDF link annotation
    • https://tajewarupimef.weebly.com/uploads/1/3/2/6/132681391/rigijazorazenu.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/bevozipudumewiduwamovino.pdfIn PDF document text
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/7219537.pdfIn PDF document text
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/2110462.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/talati_book_free_download.pdfIn PDF document text
    • https://vadalafazewa.weebly.com/uploads/1/3/4/8/134897988/1059675.pdfIn PDF document text
    • http://zujuzerawijuk.medianewsonline.com/kuxumujino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_600d5f9e7bd11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369643/normal_5feb9811d5be7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_8710de5f19294b4790c3c9fd8b7adc44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a56003e-1847-4678-8676-183199ce0d32/susarerosozetunuwon.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/how_do_you_replace_lid_switch_on_whirlpool_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/28126786941.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_e34da47b5279452aa8d068b0966b1789.pdf?index=trueIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_4402aad0c1c3448288f9b6b736cd513e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/18747013479.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/dapawedamagupawipixema.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_06ab316b43a243608f951cccdcc80af8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf35bf3-ba18-440d-92f6-08feaae49cc7/gubuvodujigafawomiwuwesaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8ddaea-c1f6-46e4-b297-156e946337d6/how_long_is_navy_seal_training_reddit.pdfIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_902d8ad1e98b470a9a47f739b8f3155a.pdf?index=trueIn 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_off000111af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AF 5380 bytes
SHA-256: 46220c99c98bf304a52170e0f526ea15de36082b15416a3773e0540d70dfeebf
font_01_sfnt_off000123dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DD 11348 bytes
SHA-256: 9cc3d2b3e16c023e405ce6243947561b840af6db59d6040e7c62d0ee1fb4a9e2

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