Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e47b92b90ee0de…

MALICIOUS

PDF

81.2 KB Created: 2021-02-28 04:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 79ad2433c370e2f47ad01c19c3a00b86 SHA-1: 429a608a51f7dca12eed8c82dac128b5de4a1132 SHA-256: 41e47b92b90ee0dea2e321f1313f10e6d67309b9c1e63d84f7dab83581ae1af4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the ML classification strongly suggest this document is designed to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=nc+high+school+graduation+requirements+for+college PDF link annotation
    • http://xilexevu.scienceontheweb.net/how_to_connect_onkyo_receiver_to_bluetooth.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/whirlpool_edr2rxd1_refrigerator_water_filter_filter2_3-pack.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/hp_photosmart_d110_printer_wont_print.pdfIn PDF document text
    • http://domensita.fun/rifawunudn5o8b.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/jajiijC/jopozonuweselefelatu.pdfIn PDF document text
    • http://sujatafuluwariv.22web.org/95424902569.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/jesaritezepaka_kidolokewewu.pdfIn PDF document text
    • http://beautysss.site/964789716157tl14.pdfIn PDF document text
    • http://govnosiakxws.online/icloud_unlocker_softwareejb7r.pdfIn PDF document text
    • http://x-bionic.shop/convert_midi_to_musicxml_online61y0t.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/MhjgdMz/toca_builders_apk_free_download.pdfIn PDF document text
    • http://sushibara.net/2841494270193scm.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
    • http://lamekukibudinos.epizy.com/48645994945.pdfIn PDF document text
    • http://nenumagurebe.rf.gd/wexek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 5412 bytes
SHA-256: c81e864acd7d67a92840709704853fb4631375482fea4f90322eb93b7de4b41e
font_01_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 11008 bytes
SHA-256: bf19099561d936c336c5d0c21d04b8cb095e3b15b2d3866912d1382951cc2fd3
font_02_sfnt_off000128e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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