Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00923a872653fcc…

MALICIOUS

PDF

95.6 KB Created: 2021-03-29 07:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ac1f9e2c4487eb73d54bb83bdc452494 SHA-1: 9f0c779a265abba02c69e9c83ef56c11645f9711 SHA-256: e00923a872653fcc7a83dfca17f852fd89e89e354581c2558edc47ee27c5f177
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one prominent URL suggesting a lure related to 'separation techniques in analytical chemistry pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attempt designed to redirect users to malicious content.

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://xezojetit.ru/award?keyword=separation+techniques+in+analytical+chemistry+pdf PDF link annotation
    • http://rovurota.22web.org/12180173757.pdfIn PDF document text
    • http://arevakar-travel.com/english_grammar_book_class_3u5k8n.pdfIn PDF document text
    • https://nexajatolotol.weebly.com/uploads/1/3/4/3/134308242/jegugejepo.pdfIn PDF document text
    • http://dk-inc.xyz/inside_out_movie_summaryqsud2.pdfIn PDF document text
    • http://situbune.iblogger.org/bumble_date_apk.pdfIn PDF document text
    • http://steh-sistem.ru/402178324658h5l9.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/hiiiifQ/17260703641.pdfIn PDF document text
    • https://zawivipesanupi.weebly.com/uploads/1/3/4/7/134724715/gifanesefita.pdfIn PDF document text
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/divivuni_wokorafazimokof_fawuzubadagepu.pdfIn PDF document text
    • https://cdn.sqhk.co/lamidipeke/hfoobhe/82283358844.pdfIn PDF document text
    • https://dokupikojezox.weebly.com/uploads/1/3/4/7/134740590/vebitixen-vurifo.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/jZG2Fje/parumuzixeduzemerebakake.pdfIn PDF document text
    • http://ctuxuu.com/77132092458lqwdf.pdfIn PDF document text
    • https://cdn.sqhk.co/sowotewope/aIZlgdL/encyclopedia_brown_super_sleuth_reading_level.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_e3f154e93ad2405b8ba9ea6a0176df34.pdf?index=trueIn PDF document text
    • http://tutopuwozel.epizy.com/37131037893.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_ed232ca930c34db2815e54aa148c695a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86e8cf6-4f0f-4794-9547-e8a3c70ca166/what_is_the_purpose_of_a_general_warranty_deed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2d8151-17f8-4691-9f07-e5c0665c7736/tamil_astrology_books_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833dc230-fb97-4764-a19e-36cbdc336869/31019364739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb05bc2-cc4d-4244-9fec-1659d1e17a13/miller_bobcat_225_welder_for_sale.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_off000135e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E5 5728 bytes
SHA-256: 17b7765d51322a669dac72b8b636e2a3600b39c15551a6adea7eb24a6e672347
font_01_sfnt_off0001493a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493A 11668 bytes
SHA-256: 35be7ad70c91cf14e7d07e697669ec54ce293f9e9c2f90d19bfd965a79f2f413

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