Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e19992bb3ec74e…

MALICIOUS

PDF

75.8 KB Created: 2021-03-18 19:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 298e21b1d7dd2c5d7c9ee8778a7e77db SHA-1: 895b75d68991f70ffee22e2df8a0995c1ae9dc23 SHA-256: a8e19992bb3ec74ea78ecc30f96c3663b838f62bc28baf588a3ebe11d5662887
156 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, with a critical finding of a PDF link farm. The embedded URLs, particularly 'https://botokaw.ru/strik?utm_term=ejemplo+de+dialogo+formal', suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=ejemplo+de+dialogo+formal PDF link annotation
    • https://cdn.sqhk.co/juvadujud/k2TphfN/76887075272.pdfIn PDF document text
    • https://cdn.sqhk.co/fusevesapime/FohjcXc/beat_saber_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/icjbghN/42348833471.pdfIn PDF document text
    • http://xigotev.iblogger.org/50239362698.pdfIn PDF document text
    • http://digerutejonoju.22web.org/8475935814.pdfIn PDF document text
    • https://cdn.sqhk.co/rorijujulo/v0ifhd1/funny_jeffy_fake_chat_and_video_call.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/39602960001.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/i-_40_new_mexico_traffic_report.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/livoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210cddd2-6f81-47bb-9388-2d997d89d22f/trilogia_el_nombre_del_viento_libro_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73fa340-d490-4a4c-9530-369fb357ef74/amazing_588_arrow_helicopter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab82f8a-7e74-4585-8d8b-d5b89d5d6e19/howard_miller_grandfather_clock_key.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/39799918645.pdfIn PDF document text
    • http://liboditi.rf.gd/barefoot_running_form_drills.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/9372460118.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/36225910417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ec26c6-89bf-4b47-9e2e-1cc8cd75319e/gexaluxelugifo.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_e8e39e6671f5452da62bd5f3a69b06c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/761c3acb-8754-46a8-bd7e-f79e748524a9/golf_buddy_laser_1s_rangefinder_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/75592282933.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_7ede93e624684239b44151b2c26f0501.pdf?index=trueIn 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_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 5216 bytes
SHA-256: e0aee2411f030213481cd52a3616858a4ceed37a405b80c4405bd7ed676ba3fe
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 11968 bytes
SHA-256: 95e9ebacab5ce762377fc58aabf0dac18cb5a732da7d52f9a0c7a2c0e86db96a

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