Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f250d70d7606bd…

MALICIOUS

PDF

76.9 KB Created: 2021-03-30 01:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 650dbf1ebad383b6374f291416ea438d SHA-1: ca1c18aa986763e588b96dcd21a6374c92a4e197 SHA-256: 15f250d70d7606bd676c09dd7b215b99b2bbd852827c69435f2105d85bdb9508
126 Risk Score

Malware Insights

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

The file is identified 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 disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to 'Canberra suburbs map pdf', which is likely a pretext to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=canberra+suburbs+map+pdf PDF link annotation
    • https://cdn.sqhk.co/kabevapixox/a9kD3gg/big_windows_living_room.pdfIn PDF document text
    • http://trylait.club/jewiwimuxisifutagikuwskn3v.pdfIn PDF document text
    • http://sivolejujivozul.scienceontheweb.net/47196781476.pdfIn PDF document text
    • http://creamwalls.online/learn_how_to_draw_cartoons_bookq8uia.pdfIn PDF document text
    • http://toreret.scienceontheweb.net/architective_book.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/cebada_propiedades_medicinales.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/jfekmje/tiktok_news_microsoft.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/dodosararabijogusukata.pdfIn PDF document text
    • http://digitalmicroteter.xyz/life_life_lyricsn3m7z.pdfIn PDF document text
    • http://nextauto02.ru/jiliphe4f4.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/poverty_mindset_vs_abundance_mindset.pdfIn PDF document text
    • http://jafalule.22web.org/anemia_de_celulas_falciformes_pediatria_colombia.pdfIn PDF document text
    • http://xapidomin.mywebcommunity.org/mitapikizejinusenijugakov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapibudajemuk.atwebpages.com/kesumiben.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/eclipse_ide_tutorial_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2e0ab8-eacb-4785-9883-54b5ef4b6be5/sozedixazufefenulotatax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035c8fb9-478d-420d-81ff-6f91a4713960/xebobapezikotefadiwugeki.pdfIn PDF document text
    • http://xafomemamaxo.epizy.com/sub_zero_642_year.pdfIn PDF document text
    • http://fomepufasele.atwebpages.com/alistair_maclean_fear_is_the_key.pdfIn PDF document text
    • http://tagetebaj.rf.gd/adwords_fundamentals.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_off0000f0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B8 5200 bytes
SHA-256: 7cea37933917366de64394ae2a5f6d76bc558947a1e3eae0a3ae8bccb95c4ecc
font_01_sfnt_off00010241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10241 10632 bytes
SHA-256: b9cf4dc89f554ffc5e1390e717bbfdb10058376aea3f7dfaae412718afca8e23

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