Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0a466e1755a05b…

MALICIOUS

PDF

72.4 KB Created: 2021-03-10 14:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a2213df453821785cc263124c617ffe SHA-1: 5f1e503d74770dc881c4c154c0252eef49e93a54 SHA-256: 7f0a466e1755a05b691a90c6ff60c074081ef5a83337269cd0bfbe686a1b4824
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://leonvi.ru/award?keyword=equivalent+ratios+activity+pdf PDF link annotation
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/8374518.pdfIn PDF document text
    • https://guwuviwanawa.weebly.com/uploads/1/3/2/6/132695801/d9a5d3a24ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485310/normal_5fd799815b1d0.pdfIn PDF document text
    • http://reduslim-sitoufficiale.site/xavariwuxiwevugoridanipixcb8m.pdfIn PDF document text
    • https://fugesozuxi.weebly.com/uploads/1/3/0/7/130739141/6494681.pdfIn PDF document text
    • http://help-violation.com/41979777782ki9ey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_5fc7feff90df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_6046063a405c5.pdfIn PDF document text
    • https://xotototovizeta.weebly.com/uploads/1/3/2/3/132303406/247682bb6.pdfIn PDF document text
    • https://binazinir.weebly.com/uploads/1/3/4/1/134108718/vonam.pdfIn PDF document text
    • http://meetsoda.pro/61472963716nywwo.pdfIn PDF document text
    • https://kinotadi.weebly.com/uploads/1/3/1/6/131606109/mufemupirapajorurene.pdfIn PDF document text
    • http://lg-copyright.com/tudesumelopbn94o.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://uploads.strikinglycdn.com/files/db2e3358-38a2-4015-9f35-36366734ea5c/31786278606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ef93b7-580d-423c-b3a2-89351e84af8b/how_to_hook_up_dish_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28707a12-b418-4e55-a375-2ecc87f0cfb3/bill_of_exchange_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9e77f0-ea45-46df-8de0-d0c556cd62ac/site_visit_report.pdfIn PDF document text
    • http://nozefemalevarug.rf.gd/botim_app_play_store.pdfIn PDF document text
    • http://dowirimidezifa.rf.gd/guides_for_brides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d486d25e-2fe9-4d44-afe3-f39528e1fd87/crank_book_movie.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_off0000d1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 5276 bytes
SHA-256: 836acf696a6becdd0dcc8717877cf04f5f9a6d8fd2221b4b2fd9ef006fa06809
font_01_sfnt_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 10000 bytes
SHA-256: 97eee60abd1e167ac9513a6097682e38f5171faa772199535fad73f505d84d67
font_02_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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