Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5fabf1ec42b701…

MALICIOUS

PDF

77.5 KB Created: 2021-04-18 02:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 59aa320678487ea5eb50e532c38ba3a4 SHA-1: 29d140db81b84241fe3d2a4652472f3dc5f74e96 SHA-256: 6e5fabf1ec42b70125f7dde5431e36151de739ad986e2cfc641c835d3ea846d8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL `https://resalured.ru/strik?utm_term=padi+open+water+diver+manual+ebook` is particularly suspicious and likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/strik?utm_term=padi+open+water+diver+manual+ebook PDF link annotation
    • https://butopejejix.weebly.com/uploads/1/3/2/8/132814220/nigotesuwe-logaxuxitexamo-vuzapa-sarekes.pdfIn PDF document text
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/2777167.pdfIn PDF document text
    • https://malafusid.weebly.com/uploads/1/3/2/8/132815748/4249488.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/5_languages_of_love_gary_chapman_test.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/fundamentos_de_investigacin_en_psicologa_uned.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/42521063635.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/80313801956.pdfIn PDF document text
    • https://xadaxiwunitari.weebly.com/uploads/1/3/0/8/130814235/1026653.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_648f1e76d46742d4a29c280f7473393e.pdf?index=trueIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_9683d7d814074b4a80a5cfcc69b2d49c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a549143-94de-4044-ba28-c009d212a1f5/xiwewuzejusarinusasuzaw.pdfIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_f0bdec5ce7334c9aaaf85bdee0a2dab9.pdf?index=trueIn PDF document text
    • http://kijonag.onlinewebshop.net/ibps_recruitment_2020_syllabus.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_0c8d8b7513424edfbb9f4484afbee39f.pdf?index=trueIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_a868db12832c4ee3a0f623e0c2033785.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_ae865b39c6ed4140b1cc6c62807797b9.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_7ad0de24570d42b0be64fb094e0108ea.pdf?index=trueIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_a09290a243cb4a848919e11da5f27ecb.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_a14b59e005154f51aa9c13352b175827.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_37da76d8428d442581ccb3570136ecfb.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_889ff18213a84138bbcf04ef2ffe1ee8.pdf?index=trueIn PDF document text
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_d3083193503a48a9ad500b93494d1f79.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_a5c61ef081fe4aa78401c16fd8e8b6d3.pdf?index=trueIn PDF document text
    • https://f0ded7c6-1882-44c2-b580-3fd8daacf182.filesusr.com/ugd/1cd4ca_768fe9fa5a294679be6ffb77bfa0100f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a0eacd-3c56-4d50-bfb8-818d13f94af9/63213561660.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_off0000f00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 5284 bytes
SHA-256: d4c00b3e8db1dd3acca59fa32032d1b1fac0655532190ac2202944b93c3a0e5d
font_01_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 11536 bytes
SHA-256: 3eb4f7d0e5dab0df82c11c90465035a7fa5613178254ad457c6057e3e170b2e2

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