Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ce193ca690c7dd…

MALICIOUS

PDF

83.2 KB Created: 2021-03-06 08:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 47b861dcaa004f98b06bc44cc9b57ec8 SHA-1: 5b6711eab87d9b38db7c944e72a89fd8cc29a9b4 SHA-256: 72ce193ca690c7dd789f24c73acc439697fe567b33f3ec8ef9caddfa596d719f
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL, 'https://crophysi.ru/123?utm_term=air+force+1+pixel+jewel+chaine', is the primary indicator of malicious intent, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to the URL's utm_term, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/123?utm_term=air+force+1+pixel+jewel+chaine In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413843/normal_601ecc29210dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_603b5f7f77add.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375357/normal_5ff9f16d37718.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/6899081.pdfIn PDF document text
    • http://gagafelame.22web.org/japawemuxedajujulumofade.pdfIn PDF document text
    • http://xamurewezoviw.iblogger.org/hd_wallpaper_for_android_tablet_8_inch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5feea20d22f83.pdfIn PDF document text
    • https://venewosusi.weebly.com/uploads/1/3/1/3/131398385/ripililuxon-jonuwaxig-xifituk-zilasupeme.pdfIn PDF document text
    • http://kusawib.iblogger.org/android_led_tattoo_detroit_become_human.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404727/normal_6038e7c5a15a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zadaxuro.rf.gd/microsoft_dynamics_365_developer_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9187fd71-3b78-4750-ae4f-66573debffd0/horus_rising_dan_abnett.pdfIn PDF document text
    • http://mosiwifu.epizy.com/victoria_secret_phone_number_to_pay_bill.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/julikagoxuxuduvubabil.pdfIn PDF document text
    • http://tesoduv.rf.gd/how_to_calibrate_masterbuilt_electric_smoker_meat_probe.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/1397462860.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/40274690159.pdfIn PDF document text
    • http://mowadavukusut.epizy.com/sheet_music_for_star_wars_theme_trumpet.pdfIn PDF document text
    • http://betitunusepa.epizy.com/3710162288.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/73284074950.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/adobe_creative_cloud_update_failed_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86af2d7-40a5-46a4-a5ef-a8ce17175ce0/essential_grammar_in_use_edicion_en_espaol_descargar_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 4912 bytes
SHA-256: a12f0c708c6cc82e3e69dac509014492ac85bcd917572fdd3bf2f55b546245c5
font_01_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 10808 bytes
SHA-256: cab9841974dabe679a5a825d453ef98779d348eb94376c02c8817498482954bd
font_02_sfnt_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3