Malicious PDF — malware analysis report

Static analysis result for SHA-256 b015787f5fc1c4a7…

MALICIOUS

PDF

78.1 KB Created: 2021-03-09 21:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 548a7adb6d7989185beb97600cd52b21 SHA-1: e387d9be9f5af573022fd2ab924e18c5c646eda1 SHA-256: b015787f5fc1c4a71aae0343d36e414797d5e6ec0d7d67c5bec3091dab2350e3
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with 'https://baarspo.ru/award?keyword=berliner+platz+3+pdf+download' being a primary indicator of a phishing lure. The PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

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://baarspo.ru/award?keyword=berliner+platz+3+pdf+download PDF link annotation
    • https://cdn.sqhk.co/nokulebepoba/fgjgLie/19690107797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366389/normal_6009550600f52.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/77523672025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5fe55035162ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_60405adb01880.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/JjeghmS/3868290155.pdfIn PDF document text
    • http://mamubisuk.mypressonline.com/finale_becca_fitzpatrick_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/APu4yjg/dalilo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_f60ef6383760427fa3563d9cfcf90277.pdf?index=trueIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_59b01c8180a04e67aab1ca172f45e6b9.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_f871efd813f6416892881c681f66bc46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/katojutelexabeputezisovos.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_6d7b9cf936a14009a236f16cc79164b4.pdf?index=trueIn PDF document text
    • http://tavamikilav.myartsonline.com/easy_learn_english_speaking.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/springer_conference_paper_latex_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/the_kiss_quotient_review.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/combustible_dust_hazard_analysis_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/short_case_study_sample.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_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 5212 bytes
SHA-256: 5a2c2758bd9f5f57a330b7645bf4a53a8c5889598b8b96fe401729d293345db0
font_01_sfnt_off000104c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C1 11200 bytes
SHA-256: 7855b4df8a7f9f4776cfa616de19edad5266f5d6bff8b7419972b61261212cb3

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