Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf67f7b3819f4c4b…

MALICIOUS

PDF

73.9 KB Created: 2021-03-09 07:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2211f802ab2b66d2ebd84bff02a0c363 SHA-1: 23e0ee197df8308bc5b6bfce8eb6478b8dd01572 SHA-256: cf67f7b3819f4c4b305e46cc9b51cde7738ca20873cfb886c71d1310dd78a20c
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 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 0.9998

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
  • 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://botokaw.ru/strik?utm_term=how+to+change+car+alarm+sensitivity PDF link annotation
    • http://twoup-viktoria.online/6471520640lqm8z.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/nieibhf/39131247752.pdfIn PDF document text
    • http://rubyshup.space/53479537167lm6xv.pdfIn PDF document text
    • http://ouily.xyz/pirinowo1km8u.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/hVLjdHR/convert_image_to_coloring_book_page.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/h5ejeHu/6581839315.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/436113a3-e3e3-4d5b-b11a-7d97ccd770ca/31456382319.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_fb31efa1fa54448f965910ea0b2ba725.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_b6c16e2ce97e4ac2a29ef39e14dd69fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4614e6-e7cd-4ee4-9900-b3bc8ecb0e6d/rekib.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_234f62f0030946398f95d95a6c28c2a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/kuxekosu.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_7c210b9231b04c88be0b5f70446650ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/bvrit_womens_college_full_form.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_12273719796f46239729b64d5e27a483.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zagubip/trusting_god_jerry_bridges_free.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_5054d9a6f70a4a5a8d4dcfd2acd417a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujanozo/latest_google_chrome_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3d80ac-1898-4a95-899c-3c57d3796731/mackie_cfx12_mkii_specs.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_off0000e48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48C 5428 bytes
SHA-256: 660974e269fd2fdc6dfe7646bb7947399fe4441378886d2dd17487d4277b0cc6
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 10156 bytes
SHA-256: ebe80fa7bdcd1d5267c4bb8dd59383a2feb918744a2f99ee5b56b1246299211b

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