Malicious PDF — malware analysis report

Static analysis result for SHA-256 2054596fab424de8…

MALICIOUS

PDF

92.9 KB Created: 2021-03-27 10:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e472514a8924400a15f3a3c95ad668 SHA-1: 6b2fb216923f99d1eb8675d8b69efe625679a6f7 SHA-256: 2054596fab424de885b4ca381315419cfb41896ad63a087aea5b95177eb15d76
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that is likely part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Pre ap calculus textbook answers', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://jumiwimov.ru/123?utm_term=pre+ap+calculus+textbook+answers
    • http://zeludupixejufi.medianewsonline.com/28553239924.pdf
    • https://cdn-cms.f-static.net/uploads/4367281/normal_6033f020dc44d.pdf
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/saxiju.pdf
    • http://wivevadevenumet.mywebcommunity.org/ncert_12_biology_book_download_2020.pdf
    • http://wedurorokim.mypressonline.com/pdf_decrease_file_size.pdf
    • https://jedogivezuse.weebly.com/uploads/1/3/4/8/134862252/e8a1e8c8fa6f65.pdf
    • https://cdn.sqhk.co/gusiloxi/ieDYyih/gefige.pdf
    • https://cdn.sqhk.co/norowitidot/hP0heja/smashy_road_arena_free_online.pdf
    • http://kakifoliwifeja.iblogger.org/cocktail_recipes_book.pdf
    • http://sarawavenudiwap.mygamesonline.org/didavoresakitixujonope.pdf
    • https://tolejavufagus.weebly.com/uploads/1/3/1/4/131437822/e1adfdd308d608.pdf
    • https://cdn.sqhk.co/wotinobeb/h14jeq1/directv._com_pay_bill_online.pdf
    • http://bupitubegedew.getenjoyment.net/dabibawogopozamoledox.pdf
    • https://static.s123-cdn-static.com/uploads/4407066/normal_5fed2527ce673.pdf
    • https://cdn-cms.f-static.net/uploads/4415077/normal_604e1b2891c03.pdf
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/1112391.pdf
    • https://cdn-cms.f-static.net/uploads/4489722/normal_603759468be3f.pdf
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5fcc9e0f163f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kukewipomexineb.epizy.com/70768549332.pdf
    • http://pujeriv.rf.gd/do_tv_ears_work_with_roku.pdf
    • http://xitajorowemep.epizy.com/xalupofumowarojiz.pdf
    • https://uploads.strikinglycdn.com/files/d90900de-8a1f-4348-b5fc-aeb55faa35fe/zononemekuvaruka.pdf
    • https://uploads.strikinglycdn.com/files/13a1093e-d93f-4cbd-84b9-34e84f7a87f8/quadratic_formula_activity_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/5011cd1f-f101-4c51-88a7-fe1f7ea19b2d/blues_guitar_chord_scale_generator.pdf
    • http://zadotelap.epizy.com/insta_followers_booster_apk.pdf
    • https://uploads.strikinglycdn.com/files/f6772771-8d3c-4868-9b45-be177c06e078/15874587521.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b64.bin
14c467f87ffac494790b23ea9a947716c6ec92b6a555bfdc2a33ac4310e26e4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B64 5292 bytes
font_01_sfnt_off00013d82.bin
32900071330c78c7e77d409dc73697ee101b3eb2a5c95c4127f272797ae29b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D82 12256 bytes

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