Malicious PDF — malware analysis report

Static analysis result for SHA-256 a076eeb06ebbecfd…

MALICIOUS

PDF

76.4 KB Created: 2021-03-08 23:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c52f77b2adc4f5c56d3d4b4570e15a07 SHA-1: 870c1eb102270f589b769fc5f438a1c4593578ac SHA-256: a076eeb06ebbecfdf6b591ddab1a739751df12cf33939ea5b7329071744ff8c5
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'seumenha.ru' and disguised with a 'gartner+report+2018+bi+tools' UTM term, suggesting a phishing lure. The PDF structure also indicates it's a link farm on disposable hosting, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=gartner+report+2018+bi+tools PDF link annotation
    • http://betmoy54.com/pemefikamelutapapiwiro7szk5.pdfIn PDF document text
    • http://chelamela.org/defender_battle_hero_kingdom_wars_strategy_gamewv3vz.pdfIn PDF document text
    • http://espaceabonnes.com/80175349199aih9s.pdfIn PDF document text
    • https://miwozomeme.weebly.com/uploads/1/3/0/7/130775979/1952738.pdfIn PDF document text
    • http://lordtrans.ru/661183840886v7w.pdfIn PDF document text
    • https://lilufegat.weebly.com/uploads/1/3/5/9/135965666/66bdd412157.pdfIn PDF document text
    • https://sevokubataper.weebly.com/uploads/1/3/0/8/130814346/5144212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_ba62079d6f634fec8409fd3f23657b96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9783cb26-a2cd-45a9-bf39-5c4b3bc99d3f/samsung_un55js7000f_manual.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_66d9d9bc1ef04779a38cfb108db6ce20.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9fd7c62-38ea-451a-819d-f3aa0f459053/semi_log_graph_paper_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa7c44d-b1f5-402f-98b7-9a35c760a477/hurt_feelings_report_army.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17725eb1-10ff-47d0-8050-5ad51fdfc31f/pibumabuwifejari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25cc11cc-0f77-45a0-b2e5-29e3bd71c73e/sanitanuwonazizix.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_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5504 bytes
SHA-256: 5f27ddb2adf939e8d163141702ea0970a5019a991a2e6b90abc27d90d71e3066
font_01_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 10672 bytes
SHA-256: aa698d62450cba4ff5aedee50cf40fae530b5cf00258f94220e527316c888e3e

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