Malicious PDF — malware analysis report

Static analysis result for SHA-256 12de33fbcdf2cb2d…

MALICIOUS

PDF

64.7 KB Created: 2021-02-23 06:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 01d14c0e8ab85a77ba11bda7d185740d SHA-1: df0b3b9b8dd50fe4f56b51d75dc20cb7b9d53a86 SHA-256: 12de33fbcdf2cb2d7cb035474d187eca5f76a1a710263a0ef6caab509e19f25e
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to opening a stapler, likely to trick users into visiting the malicious URL.

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://jottigo.ru/strik?utm_term=how+to+open+swingline+high+capacity+stapler PDF link annotation
    • http://copyright-security-ig.com/lecture_notes_on_computer_hardware_and_softwaredr31c.pdfIn PDF document text
    • http://yewes.fun/electric_field_hockey_level_2_answer39puu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wereguvepowu.epizy.com/animated_characters_3d_model_free.pdfIn PDF document text
    • http://xepijuxidejo.epizy.com/chalice_of_opulence_rune_crafting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/fakonuwofo.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/bugaboo_high_performance_footmuff_arctic_grey.pdfIn PDF document text
    • http://gatakokuto.rf.gd/putenafulizatunabane.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/xutaxawupevusime.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/55046526141.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/sinifudetu.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/regular_aadhar_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/best_flyer_design_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/al-_andalus_font.pdfIn PDF document text
    • http://nenutufap.epizy.com/tax_audit_report_form_3cd.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/film_korea_beautiful_vampire_subtitle_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/cyber_security_vs._information_security.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/64237921111.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/43643624761.pdfIn PDF document text
    • http://duwugedereni.epizy.com/90318975600.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_off0000c18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18A 5352 bytes
SHA-256: 934ba90ef66c7c2185c00a69bae39fb7c797da8349463ac42166a95832be08de
font_01_sfnt_off0000d3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D0 9816 bytes
SHA-256: 5502b26bf38044cb21be39fd14830b4248c17529e666a772b6869f45b51041c7

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