Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2a05906e80ac88…

MALICIOUS

PDF

102.1 KB Created: 2021-03-17 11:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 99a9207568315b108bbf281060294491 SHA-1: df0964c312adb803d6e5c201ee9662949a8cfe17 SHA-256: 7a2a05906e80ac8830a98160e0bc2272c4c4add7538f4bd8ceea27e4f916cd9f
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an external URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a phishing page or distribute further malware. The PDF's structure and embedded content suggest it is designed to deceive users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://mezovuduw.ru/123?utm_term=ubuntu+in+african+culture+pdf PDF link annotation
    • https://cdn.sqhk.co/nebuneduzib/QkhdgcS/24586573905.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/gahjihT/74225645918.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/takurugilij/cm_to_mm_conversion_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf63ee98-ea94-449b-a30e-16dd126133c4/how_to_reset_zyxel_powerline_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/24392626719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a621843b-3212-45ba-9bb8-f4c3801cc8ca/ejemplo_de_manual_de_procedimientos_administrativos_de_una_empresa_comercial.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_67f980cc1c3141b295e01f5979c79e66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a2c911-e764-4c22-8161-f17a74c2065b/what_do_the_words_pax_romana_mean_in_latin.pdfIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_c16c387067b64892964260b0a102943d.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_92e038174cba4ba99526e323e1fbbc7b.pdf?index=trueIn PDF document text
    • http://zavufomagug.rf.gd/get_free_credit_report_once_a_year.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/acneiform_drug_eruption_icd_10.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_9b7e3d070c6840b79593c395d62681e2.pdf?index=trueIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_5ad503b8563447089f3aab7f2e7b6bf1.pdf?index=trueIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_94cb1e8f419441b5b3f0424f82fe796b.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_a62c552266974b609a88bdc942f70991.pdf?index=trueIn PDF document text
    • http://wirirarosutuki.epizy.com/11423208331.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_off00014fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDD 5104 bytes
SHA-256: e51d7a224d7033d1d06746a53f7726bf18b0a3a93aa3b15e4c3c89360f6ab815
font_01_sfnt_off0001614b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1614B 12324 bytes
SHA-256: e59090e961a660e75fc7a471166352bea0cf97bfce02851fa0c0cc1e71590653

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