Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2ab6b883a6e541…

MALICIOUS

PDF

135.1 KB Created: 2021-05-13 04:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 995cd4126eafd3bc93bd47dff09703d9 SHA-1: d9e22f69a1e1a17dbfe2e6c430a7d7875d108508 SHA-256: 5d2ab6b883a6e541142fa7a10cd40fb00ec1c17b923e40e53a15018d72bcb69d
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 0.9969

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://kuzutuzo.ru/strik?utm_term=mango+street+wedding+photography PDF link annotation
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/waxabuso_kebujovetege.pdfIn PDF document text
    • https://mubagaluzab.weebly.com/uploads/1/3/4/8/134874300/0fb0b.pdfIn PDF document text
    • https://gofubajub.weebly.com/uploads/1/3/4/6/134632898/zepuweseb-vekuxe.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://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_0937b51fe12047d8b7fb79bd0577d68a.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_8ee32b4f55634938816f9e3e70a165e4.pdf?index=trueIn PDF document text
    • https://0404cab7-c021-4537-be79-420bcb2f88cc.filesusr.com/ugd/52c240_4037cb2ecd94477c8983df999cf187e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/16460289628.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/42896756095.pdfIn PDF document text
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_b4bd063349d2463998cb7a2f3b7343f2.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_1cc41746df244a62a3b6716d1058689f.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_87108bd8a78c4b7c878e9f025160be50.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_df4caf3a25c04472bd9352f1acd17e4e.pdf?index=trueIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_515a95db81044d5cb59dd4dc0bb9bcb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasutiz/android_phones_below_3000_pesos_2019.pdfIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_bf6c0c19648945e9abec1782159d8376.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87220c8b-b8fe-4acd-a0e4-b104627114ee/zosozatagiwakagosuvez.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/lukebelawunisi.pdfIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_b0b2ae2ac10f4bcdae009dee0b4533e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f77ac8-98e7-4e13-bfcf-2981788c0a57/elgato_hd60s_sound_capture_download.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_2beee54389c04a0682c702e7ef89b02e.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_2939018655334faa8964e8fc29c99323.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8DC 3044 bytes
SHA-256: 18b052cc7ee1af0dc28d02b7ba609d7f268bc348feb7db5a5451a39709b7978a
font_01_sfnt_off0001b3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3B0 5176 bytes
SHA-256: 8d4389651feb2fd86fca4278ba6a59b9de56cd52c39cd861da1c30a797abe040
font_02_sfnt_off0001c557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C557 10848 bytes
SHA-256: 06cad20a3419789c59d37e660a99d93dab30873142e8cc3e879f366659194f72
font_03_sfnt_off0001ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA98 16060 bytes
SHA-256: 84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727
font_04_sfnt_off0001ff2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF2B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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