Malicious PDF — malware analysis report

Static analysis result for SHA-256 822486bcea851d9c…

MALICIOUS

PDF

74.6 KB Created: 2021-03-08 23:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 56f84379eee6997e74bfb8a85ffbd570 SHA-1: 5a55dcb19c53d08a03048bb085e23f4558376673 SHA-256: 822486bcea851d9c2439d8f92f081813469487f164b98c82a50a7a0d5de904f5
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a 'rainbow vacuum d4c manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=rainbow+vacuum+d4c+manual PDF link annotation
    • http://opticsystem.website/star_wars_vintage_collection_stormtrooper_rogue_oneogexl.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/98250468294.pdfIn PDF document text
    • http://xovitixekewelom.scienceontheweb.net/software_architecture_roles_and_responsibilities.pdfIn PDF document text
    • http://lazadacostumercenter.com/55778960658p6nr0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5fdc00c7a2613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_601f667f7be0f.pdfIn PDF document text
    • http://mangalvpodarok.ru/70434181877azhlg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_5fc9fde48b0b0.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/c3e068d8-c2fc-43a6-a392-7331984c6e43/rabbit_hole_legal_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71cfba9d-f816-4923-a19f-9057e53148e5/patudivitopemaxujix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f87d99e-2c6a-4ee4-80ef-2ff37a9ad7cd/what_is_next_closing_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1773af9b-5958-4aa8-b431-79ea16a2ed34/ocr_a_level_chemistry_depth_paper_2016.pdfIn PDF document text
    • http://safilizejodi.epizy.com/mosagathi_album_kannada_song.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/what_is_mcdonalds_hourly_pay_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f72e460-a594-4be5-b60b-3a50adf4a04b/kalipedesudiwiwok.pdfIn PDF document text
    • http://fonujepurixadal.epizy.com/2734924679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed623fbc-880e-4e0c-8121-423e54351475/zikikixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7534c3c6-385b-4710-9ba5-fbaf32d92df3/53124391030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96c34c4-7a9f-4cd2-add1-f512f3c05155/sezudulejusodogiperape.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/xetavokubokebezubesa.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_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 5196 bytes
SHA-256: 681c5f2f1587336e23f58ea9427ec7873fb6d375ecf26fe57a33f5452116771b
font_01_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 10476 bytes
SHA-256: 39ab141c64f57539543b1c334fb27167e2244067a02f6487025240cc3dc2ff65

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