Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd902f32e39e556e…

MALICIOUS

PDF

80.4 KB Created: 2021-03-05 01:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 990374a05d5c336370760ae2bd85a2c1 SHA-1: ed23854b85ccd7b675830adfb0627672741438cd SHA-256: cd902f32e39e556e25f502962a4a0b325299f3c988ef70aff97335cbca747be0
116 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick the user into calling a phone number, a common tactic in tech-support scams or refund phishing. While no scripts were explicitly extracted, the presence of embedded URLs suggests a potential for further malicious activity, possibly involving JavaScript execution within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/wix?keyword=water+source+heat+pump+troubleshooting+chart PDF link annotation
    • http://gekifek.scienceontheweb.net/kindle_fire_hd_7_3rd_generation_cyanogenmod.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/01af922280aa41.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/hinieif/talking_pierre_the_parrot_app.pdfIn PDF document text
    • https://zajolapa.weebly.com/uploads/1/3/0/7/130776493/8146423.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/tom_clancy_jack_ryan_series_books.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/how_would_you_move_mount_fuji_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/jiejgpc/1351827463.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/yaesu_ft-2900r_service_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jojewezalika/vhdihjc/demowoxumajobudunorew.pdfIn PDF document text
    • https://vujivizu.weebly.com/uploads/1/3/5/3/135305207/2802111.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/tgfgelX/empire_card_game.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/roguz.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/4AtKgi0/calculator_free_download_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6089f83d-7c41-42b5-b107-50163da43301/korg_microkorg_analog-modeling_synth_vocoder.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/galls_bureau_of_prisons_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/16242533898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a637d3e5-553b-49db-b5cd-84c3e3188b2d/cc3_selected_answers_chapter_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470c4069-6d44-4ab0-b06b-f056a5ed56e5/how_to_remove_glacier_bay_faucet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3fdc81-a21f-406a-ac4d-c4183f59cef9/46866518813.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/walinubeguzi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/bangla_adhunik_gaan_song.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/lekobutavipadegokekegij.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_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 5500 bytes
SHA-256: c25927969bb9acb61b894f1d0a4c9ae3af5a8221f1c6f1c88a4f7e45743e5e8f
font_01_sfnt_off00010e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9A 10984 bytes
SHA-256: b2ead433d10457f30e9b0e4985e168ee9a10d7ef282a795e4b4330035b4383c5

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