Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0a4de00c0a4335…

MALICIOUS

PDF

74.1 KB Created: 2021-04-08 07:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a06216c77e0503af897d87dd9106bc32 SHA-1: c9f1f4548caea30a802673e23ead962f64e39490 SHA-256: 6b0a4de00c0a433505a670ff49d2badcc7467a11f7a8b8031ed4a55457efb6eb
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains and exhibiting characteristics of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely leveraging T1566.001 (Spearphishing Attachment) for delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=riello+rdb+nozzle+size PDF link annotation
    • http://itash.space/weromerowivujdzugb.pdfIn PDF document text
    • http://idealsit.space/how_to_setup_my_polk_subwoofer15omc.pdfIn PDF document text
    • http://feelslike35.com/62633809580v496t.pdfIn PDF document text
    • http://sewonmedix.ru/931803372624mgtu.pdfIn PDF document text
    • http://in-arenas.com/singer_promise_1409_manuale_istruzioniyj6t2.pdfIn PDF document text
    • http://leftoutclub.com/vojurexe3qwkf.pdfIn PDF document text
    • http://fovuvizoge.22web.org/appsc_polytechnic_lecturers_notification_2020.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/71785845149s4ptg.pdfIn PDF document text
    • http://rabota-plus.club/atmel_studio_6_tutorial1i45a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozoxub/xijilejavufafa.pdfIn PDF document text
    • http://femejuzi.epizy.com/ultimate_plywood_workbench.pdfIn PDF document text
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_ef90bb86ee174c67a86f1a9c0ee6ea0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pobixedele/list_of_us_army_ranks_wikipedia.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_d24e626919844f3f8b78b7e26d955e55.pdf?index=trueIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_0cdb311349584dfa9810bbb25dcc57b1.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_b3ce2b2b4eed44168743c26c9228197a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/hola_extension_for_chrome_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/devaxow.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_1e6611bea9a640cdbeeabdcbdf6cb145.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/68692275862.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_09ee724e1d09413d8537554eed8d67b7.pdf?index=trueIn PDF document text
    • https://969948a0-d7f7-4827-958e-a3856fee42d4.filesusr.com/ugd/9d40bc_49f77a9a42fa4aa3b2a6fee759fc945b.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_off0000e3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F3 4808 bytes
SHA-256: 0eadc56e4e067841cd8f9a2437f5828476db5e517c2d1986c9961af2fca42889
font_01_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 11472 bytes
SHA-256: 43cea4bec664ce18ac10ff6da268726b9d98745b752744c43a973b4fc70c55c7

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