Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f300119f21cb08…

MALICIOUS

PDF

69.7 KB Created: 2021-10-03 11:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0c736e56513a35c05912060d6e931dcc SHA-1: 7f9796a2c04c6bcc6cdbe4b7933e359731579542 SHA-256: 71f300119f21cb08624be54c5a23e70d9bd536b72c9222c07e0c9b456ccfadd8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The numerous embedded URLs, such as 'https://garglob.ru/uplcv?utm_term=chicken+adobo+with+pineapple+juice', likely serve to redirect users to malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=chicken+adobo+with+pineapple+juice PDF link annotation
    • http://antonio-pelella.eu/userfiles/files/85453327199.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144573fad378---73454603769.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/pekefuwagune.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/regapavefujejupelu.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/70663527142.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/10896117749.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210926161814.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613810d3f0fc6---palufidadamibis.pdfIn PDF document text
    • https://spacio.hk/attachment/file/72557258772.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/93173152229.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/wuzaxixagegufegowozoma.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/724651803.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/79158988398.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210903004920038.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/wavukafujiguvegumeliputok.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/lepuvilovubogepo.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/7818177618.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/gaxasodelowave.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/gilasupijarefosuzalaniv.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/25123419183.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/18908771193.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/siremepunusegusinisakixeb.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://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_off0000af70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF70 16184 bytes
SHA-256: 0356287ac467113290adfdc4617b6d80bddf80af334c1fe17407d1a3cafc8173
font_01_sfnt_off0000d898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD898 10920 bytes
SHA-256: e007a538c85490b805c335b74f568f4a2c6576d5557ed4cf36922aa7e928da4c
font_02_sfnt_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1