Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68433009d201866…

MALICIOUS

PDF

76.6 KB Created: 2021-03-22 11:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c2b988a16be6d6203e77ddee4c4ce51a SHA-1: 10f1ef3da3f5516b1c35636c789b34029892c5f3 SHA-256: f68433009d201866425bf57812e2bd1223f05a73838f4e4e165778c189e32f68
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website related to nursing program interviews, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the presence of an external URI and the high confidence scores suggest a phishing attack designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=how+to+prepare+for+a+nursing+program+interview PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413369/normal_5fe278f4969b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_5ff8ee525066c.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxezitowefi/iiMHNgc/download_pixel_car_racer_mod_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/7icgdid/diy_craft_ideas_for_adults_pinterest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_604bc0391f34a.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/vgjhhZ4/wamikep.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/tiduro/lefoxusugujuposamef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0865b095-911f-4944-bb4e-b91c0d80dcd0/beats_solo_2_wired_user_manual.pdfIn PDF document text
    • http://tabikobi.epizy.com/che_guevara_books_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b76f339-935d-49c1-ba61-0b3b865d4326/jogavinilivexot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314a15a9-1d09-459a-8e0a-3d1250586f4b/6031785139.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/zibekupepupaloliginexeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ad26b3-0c61-4507-8fba-d56c14e976fd/serato_dj_lite_1.0.5_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/larkana_weather_report.pdfIn PDF document text
    • http://jeromipaxipuda.rf.gd/the_cat_in_the_hat_cast_members.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23348a58-8b13-4718-abfd-cc16fd16cc0b/how_to_play_the_saxophone_alto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c2c8d7-c483-47a6-b3d8-39b4a0bcc81f/the_crown_season_4_episode_7_imdb.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/22645251708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc80ef39-7307-44f6-bd9c-ebb78bdd0ee6/6253597850.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_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 5300 bytes
SHA-256: 91e731fe35fe560a1caad34304bd86573c20ec72aa7e3b0f3228ca06a188988a
font_01_sfnt_off000100c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 10528 bytes
SHA-256: 54931d4909d1282ba8583739dea4a7cf1459446abf86fa82095a0e47f41b4a6b

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