Malicious PDF — malware analysis report

Static analysis result for SHA-256 f561674742b216af…

MALICIOUS

PDF

84.2 KB Created: 2021-04-11 17:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0d4b002cc500dbc70beb0c871a800dba SHA-1: f609728b3ebe0969cb2c8e615ba2a0503033b7c2 SHA-256: f561674742b216af831f1ce2d89dcde2cf8feeba241b8061f5cca91da886f64d
126 Risk Score

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 0.9991

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/strik?utm_term=bradley+smoker+parts+manual PDF link annotation
    • http://likefetevu.getenjoyment.net/97722609313.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/IenhjdD/great_deals_on_wheels._us.pdfIn PDF document text
    • http://xagixowedobosab.medianewsonline.com/fojumezamejufexutagejov.pdfIn PDF document text
    • http://moneyindia.site/3723083099nfj0a.pdfIn PDF document text
    • http://krepezh.guru/xejokezedebigok5wocz.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/gEXoWA9/fowafusokupumesadovu.pdfIn PDF document text
    • https://cdn.sqhk.co/dameseri/hb7H17u/ludzie_bezdomni_tom_2.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/VOhdBtK/44914281075.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/gcW4rdg/37240460214.pdfIn PDF document text
    • http://rabatil.22web.org/fogizujufivutewijudoro.pdfIn PDF document text
    • http://xenojupu.mywebcommunity.org/7th_grade_math_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzomowa/heihRjg/carmichael_weather_report.pdfIn PDF document text
    • https://cdn.sqhk.co/ranilabar/gfRtjjM/31140541703.pdfIn PDF document text
    • https://cdn.sqhk.co/motakolilo/ghqVdkS/niribaxobim.pdfIn PDF document text
    • http://figedizizexi.22web.org/marianne_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/hjOijix/dirodugefozuxonilalux.pdfIn PDF document text
    • http://lazadacostumercenter.com/environmental_geology_study_guideh3rus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fodose/zigogowifepiwaxafun.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/osrs_fletching_guide_money_making.pdfIn PDF document text
    • http://konajif.epizy.com/pefinimakitaf.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/81874242984.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/60663708913.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 5152 bytes
SHA-256: a6f2c738d4eded661276e6ae8f6d5b63564a8ab2c9fefd2eda0ff109d7c41393
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 12584 bytes
SHA-256: bf6b5356fe2a4da02a3f7f67cee2bd739298d18ad55e42ff5887429ae74f3f59
font_02_sfnt_off00011ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECC 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off00013363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13363 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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