Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f88a9b7fed5e18…

MALICIOUS

PDF

80.6 KB Created: 2021-04-11 18:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a0d7320d284c2dda8a0c33eb4ee98837 SHA-1: d0b1c14829b77c5e67da83b8eb73597b1fadb91b SHA-256: e6f88a9b7fed5e180aa5890e915063b7ece883e8dfc8b56d7e97800c60b8519a
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('maypoin.ru') that appears to be part of a link farm designed to redirect users. The document's content, though heavily obfuscated, references 'Fujitsu halcyon dc inverter economy light flashing', suggesting a lure for phishing or a scam. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=fujitsu+halcyon+dc+inverter+economy+light+flashing PDF link annotation
    • http://blog-millionaire.buzz/legagozozebiduwexxl7j8.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/dQCXk5W/13559199981.pdfIn PDF document text
    • http://my-favshoph.online/gavelefofaduzevadiqfot9.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://idealica-italy.site/30_day_transformation_pland79g1.pdfIn PDF document text
    • http://dkmz2.club/6201923173493wvv.pdfIn PDF document text
    • http://prizinsta365.website/b_extract_form_rto_karnataka_onlinel00vo.pdfIn PDF document text
    • http://pisobadepujo.22web.org/python_programming_interview_questions_javatpoint.pdfIn PDF document text
    • http://neyroskakalka.site/4968427176m06um.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5ff65856ebd05.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/hhOhbhd/mixufera.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/Vegdja9/36495458720.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/hdjjhgf/800_words_cast_imdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485157/normal_60524a9496169.pdfIn PDF document text
    • http://bioforce-co.site/how_to_write_a_thesis_for_a_compare_and_contrast_essaytazlj.pdfIn PDF document text
    • http://nukels.xyz/buck_converter_switching_waveformsmm37b.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/iiTkhgb/menujitovadosigefovolejup.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/53b0c155-96d7-4c1a-960a-0fd8d5721020/luxor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e168fd-2c9a-42a9-8d62-7aff8944d7b9/therapeutic_foster_care_pay_nc.pdfIn PDF document text
    • http://tupibamogowoful.rf.gd/39496620317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b32a79-a4fb-4989-85ee-e05c5239d396/cuanto_son_10_gramos_en_mililitros.pdfIn PDF document text
    • http://lusozeto.epizy.com/mazepale.pdfIn PDF document text
    • http://kilubediboxut.rf.gd/definition_of_therapeutic_drug_monitoring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61cff6c-381b-416b-ace8-d4c9543694c8/suburban_manufacturing_company_water_heater_parts.pdfIn PDF document text
    • http://purokazurawilew.rf.gd/big_ideas_math_geometry_teacher_edition.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_off0000f8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DD 5628 bytes
SHA-256: 8e5bee2d5ee0ed0f2938c238b029b8e85d8b5917747de93994b9789aaa688605
font_01_sfnt_off00010bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEE 11996 bytes
SHA-256: 5e2477c703e5ef13ebd24bb127e244d60292e63dcb8377fe131db0e1e09088ca