Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bbdff5d88ceba5…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 13:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f8a8d8765619d6c08e8f80f73d533b62 SHA-1: c809b225fac8fae9f6483b78bcbdd927239c1d2f SHA-256: 25bbdff5d88ceba57a0e1b02dd9b5def89bd043d0fd6a04289d304034b628866
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is presented as a search result for a specific book title, indicating a phishing or social engineering lure. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of external URIs suggests the document is designed to redirect the user to malicious content. No scripts were extracted, but the overall structure and heuristic firings point to a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=secret+of+the+ages+robert+collier+pdf PDF link annotation
    • http://latujor.22web.org/27047457361.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/ihjfNYQ/goniwomud.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/jfBsaql/6259909071.pdfIn PDF document text
    • https://wivaralizufijol.weebly.com/uploads/1/3/1/4/131483386/xewatelokinovoz.pdfIn PDF document text
    • http://devgm.design/dungeons_2_demon_guidewhc2x.pdfIn PDF document text
    • http://blacktea.space/how_to_change_hamburger_icon_in_androidc02bb.pdfIn PDF document text
    • http://cloudmarket.website/vesorogokavipoylxz1.pdfIn PDF document text
    • http://begemot.space/the_importance_of_being_earnest_2002_full_movie_online_freebaavv.pdfIn PDF document text
    • https://tenosufude.weebly.com/uploads/1/3/1/4/131455069/sasogasasibo.pdfIn PDF document text
    • http://allieshouseofhope.com/29324724788dppag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fd29890c38fb.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/cggijda/73849099567.pdfIn PDF document text
    • https://voresefum.weebly.com/uploads/1/3/0/8/130813922/xukejikal.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/g1Ggjgc/forest_kingfisher_bird.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nimuwet/free_agnes_monica_rapuh.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/fotaxolok.pdfIn PDF document text
    • http://lekipuvuji.epizy.com/71612342668.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/lingua_latina_exercitia_answer_key.pdfIn PDF document text
    • http://vuduluxepo.epizy.com/mifutaxowe.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/dorepudinojavob.pdfIn PDF document text
    • http://lekololekepogip.rf.gd/1291395833.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5660 bytes
SHA-256: 5fb8326b94a307db34270ade87a0f1450e8daf10d6f2ed2714d7114c20e5d152
font_01_sfnt_off0000f163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF163 10580 bytes
SHA-256: 9e2b1930d3dfb78b4b047a28192692f53fda7e197b4f0727e746bfa0cc94fe6c

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