Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b5ef4bc38c1c39…

MALICIOUS

PDF

85.4 KB Created: 2021-05-05 11:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cc6436453b40eaa2f9e6caa2bdce35b7 SHA-1: bf56bf98bd29400680d09e3c42e355ffdeeb79c3 SHA-256: b1b5ef4bc38c1c39ec9935dc639c2bc182f1f0aa3990c0849753f73e5bcc72cd
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, which is likely the primary payload delivery mechanism. The document body, though partially corrupted, suggests a lure related to sewing machines, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/strik?utm_term=singer+sewing+machine+model+7462+foot+pedal PDF link annotation
    • https://cdn.sqhk.co/pekobenew/0Vjcjfr/tavaduxenageluribepop.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/best_biochemistry_books.pdfIn PDF document text
    • https://lufojegixibebaz.weebly.com/uploads/1/3/1/4/131407324/tijum.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/design_lab_ideas_for_physics_ib.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/zinagogojup.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/83214740843.pdfIn PDF document text
    • https://zelivetatop.weebly.com/uploads/1/3/0/8/130814581/2b43a3c.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/fkI3hhf/wijumiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/ciHaieH/12363748846.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/pudav.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/estudio_sobre_el_bautismo_en_agua.pdfIn PDF document text
    • https://kemewekodu.weebly.com/uploads/1/3/1/8/131857474/ziwurimorirej.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/hfUAgfC/dungeon_keeper_3_war_for_the_overworld_download.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/readings_for_sociology_8th_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabelinowizufe.myartsonline.com/biology_textbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/trane_reviews_complaints.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/how_to_reset_insignia_fire_tv_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/bosch_dishwasher_sms66gi01i_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/tappan_stove_oven_not_working.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/bufipobugobewawug.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/hvac_electrical_symbols_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/vii_par_craneal_nervio_facial.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/7753294717.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_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 6220 bytes
SHA-256: 9dc091d8e50051ec1aebaf4bb029a1493804f4838bf69c4958a59806e2e06731
font_01_sfnt_off000121f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F4 10796 bytes
SHA-256: 5bd4cede667b6c19567b5cbab0e1246db569d8d2ca793d5b99729fe8a10545f8

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