Malicious PDF — malware analysis report

Static analysis result for SHA-256 8195bf89bf83bb56…

MALICIOUS

PDF

72.1 KB Created: 2021-04-07 04:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 10ca2afd84a24c2524ae3d49a7c06857 SHA-1: 465ef3d16f41829c23a73f53f40312e89370445d SHA-256: 8195bf89bf83bb56182cbdf3d9d51bba8bdd27470b90a615af07ccd76505330a
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 link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=ap+chem+solutions+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/nowavutu/iaghIgi/vazape.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/7f7356.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/0icQgeF/robot_real_steel_full_movie.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/interview_questions_and_answers_for_banks.pdfIn PDF document text
    • https://xijexarara.weebly.com/uploads/1/3/4/0/134017378/2995970.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/nabijinovogolijufefipu.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/hp_photosmart_6510_ink_amazon.pdfIn PDF document text
    • https://luwujejajevobo.weebly.com/uploads/1/3/1/4/131407494/717166.pdfIn PDF document text
    • https://zaximasuxudaris.weebly.com/uploads/1/3/4/5/134590642/terejixigogoze.pdfIn PDF document text
    • https://tirasuvemesamu.weebly.com/uploads/1/3/4/6/134672388/labemujokinepevarog.pdfIn PDF document text
    • https://ralufuluwifo.weebly.com/uploads/1/3/0/9/130969066/4853499.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/zonjhwF/kuribaxosajaxuvaki.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/7d1e5178-e597-49b2-97bd-58bb0e830188/nenugopowifutak.pdfIn PDF document text
    • http://pibesisunujeg.epizy.com/15660025842.pdfIn PDF document text
    • http://jivalaki.rf.gd/artificial_intelligence_notes.pdfIn PDF document text
    • http://ritanuwo.epizy.com/rixinikumuv.pdfIn PDF document text
    • http://bexumasifawej.epizy.com/8038775636.pdfIn PDF document text
    • http://vuwadiwotaja.rf.gd/monthly_desk_calendar_2019_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0034ff-77b4-4ddc-a044-42689b6485ad/83721416332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e151e66d-b2f8-488d-9130-023d79d4e9a5/mojibewok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ee81c6-eda0-48cf-af1e-df0a9a3c82db/75652915451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ae2fb0-3b04-489f-b51f-4df511de6b82/how_to_reset_canon_ink_cartridge_281.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_off0000dd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD41 5320 bytes
SHA-256: 8d37a8ce416f04f385bf9d2a9df2c0a5f11ade18b32f44b68cc10a8e0664e6bd
font_01_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 10028 bytes
SHA-256: 3d6eda51e7f09bd932c49238520367ef318d1cb6934b12dcf511589ee5eff961

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