Malicious PDF — malware analysis report

Static analysis result for SHA-256 22478b0d969db080…

MALICIOUS

PDF

95.3 KB Created: 2021-09-17 14:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 779bde4439879d09dd3d3f639946b463 SHA-1: 718ae5077f946b4b5a585393fbe92401c8abde49 SHA-256: 22478b0d969db080b069e9fbf71411f1cec1a3385fe5ce9ef77e966cffc0c4a1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting and are likely used for phishing or to redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to external malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pistant.ru/uplcv?utm_term=la+vita+%C3%A8+bella+full+movie+free PDF link annotation
    • https://rotitelor.com/contents/files/82093570293.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///pejej.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/rozilodokavumuva.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210909045015.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/webimad.pdfIn PDF document text
    • http://com123.vn/uploads/file/farokijetok.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/zegobubabevax.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/99411502953.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f584e9dfb---45712702355.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/76714808966.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/19297604657.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/30664644014.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/96635798458.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/jagozif.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/kezesisogeviwugenugu.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/41928083538.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613561a3ee95e---vadepipog.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/13922321958.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210903_6C09183F7AE9EE43.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/36699708831.pdfIn PDF document text
    • http://lactopad.com/uploads/files/8846089541.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/69369845548.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/lukisekasijafenavejasu.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_off00010b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A6 10524 bytes
SHA-256: 0712ef0b612209f3fb99e1afaae195b47eef175dd1d5919962b6af54c820f32d
font_02_sfnt_off00013b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B55 19148 bytes
SHA-256: 8270d8c249721083cb9f7895c4f8892dd916f5a7227f13d232011f85f1cccd33

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