Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d17fd6bca0ec15…

MALICIOUS

PDF

104.3 KB Created: 2021-04-06 15:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 42d6c418a69a18fe3dba6b5298c11a00 SHA-1: 54604537028673268ebf0d2bf76616009a54ae1f SHA-256: 25d17fd6bca0ec15b8d4c73cccd15307a1464f47ef37c5767ebe093228f6b778
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/wix?keyword=cuisinart+cgr-4nc+5-in-1+griddler+manual PDF link annotation
    • http://kogutojoveso.mywebcommunity.org/fizovikebakilimoninejuna.pdfIn PDF document text
    • https://kutobuxuvesoga.weebly.com/uploads/1/3/0/7/130740510/wirerotajalimo_kufugetedul_xixuroduwus.pdfIn PDF document text
    • http://fekosuse.getenjoyment.net/power_electronics_a_first_course_ned_mohan.pdfIn PDF document text
    • http://magarunu.iblogger.org/bugejopaluriboku.pdfIn PDF document text
    • https://wotawodakel.weebly.com/uploads/1/3/5/3/135316359/3a2b67254.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/aprendizajes_clave_preescolar_para_descargar.pdfIn PDF document text
    • https://bexopugizabon.weebly.com/uploads/1/3/4/0/134042324/7092579.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/ropenofu.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/zigego.pdfIn PDF document text
    • https://pozusope.weebly.com/uploads/1/3/1/4/131453674/jusikukobewalesevig.pdfIn PDF document text
    • http://numulul.mygamesonline.org/patavozizifasegotove.pdfIn PDF document text
    • https://dujewukemapaf.weebly.com/uploads/1/3/1/4/131453220/71f913.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/767662af-e2e7-4103-a818-75014e3cef7f/56403974417.pdfIn PDF document text
    • http://xobofob.rf.gd/sheet_music_adele_when_we_were_young.pdfIn PDF document text
    • http://fewabimamitaro.epizy.com/adeleke_university_school_fees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bccc2d7-7bef-47a6-a5d7-a2cc81b7eec5/8300169012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101b5549-597e-4dd6-9931-78e216e68f68/basic_house_cleaning_supply_list.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/pobisumulogigivu.pdfIn PDF document text
    • http://tazigedefabe.rf.gd/56175272793.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE5 5460 bytes
SHA-256: 590e430cb66150bc40bded836c7319b979a999e00176f07378d0ed99e12703c3
font_01_sfnt_off00015272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15272 13176 bytes
SHA-256: 23187e730d30d3c9ba112e46e50bfdfb69a8234b218de0197eb5fc7ddf72fd1f
font_02_sfnt_off00017e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E6B 16120 bytes
SHA-256: e8b7bf697cba0d2aa07c43e4275b090eaed1d7cc8cf522c287e0773ddebf5313

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