Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c06cd434dec00b…

MALICIOUS

PDF

82.4 KB Created: 2021-03-14 02:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7fdaf3d1bbae38ea202d6bc54022b1b0 SHA-1: d585b077781c8b81069739d4b6587be28781e6a8 SHA-256: e1c06cd434dec00b3b5304a027b6013e264ebff023d29473585cc660c58b0917
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. A heuristic identified an image lure linking to an SEO redirector, specifically pointing to 'https://dugedepap.ru/strik?utm_term=what+are+the+stages+of+respiration', which is likely used for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/strik?utm_term=what+are+the+stages+of+respiration PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451762/normal_603576a958454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5fe0ab4f1fba5.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/capacitor_code_calculator.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/sony_icfc1pj.cek_clock_radio_with_time_projector.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/piwaluzib.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/420686e0-e1b3-44bf-bec5-4e91da4d43b3/41111980104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35fc411-26fd-494c-82b9-d48354babca1/lapupukulexagiwazirapij.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/26683842233.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/jutirakemukevudovutor.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/caterpillar_butterfly_life_cycle_worksheets.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/70352767700.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/bench_press_form_arch_back.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5da294-0946-429c-97db-dd5a31391893/78499501611.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/behringer_x_air_app_for_android.pdfIn PDF document text
    • http://duvefik.rf.gd/60556348000.pdfIn PDF document text
    • http://nizovovik.rf.gd/53096055179.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/40084034468.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_off00010731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 5144 bytes
SHA-256: adcbd9e56179b0e0a9f37381f7ecaf86c1f9d6bc2cb0db1a4b22ee7dccf4d1a3
font_01_sfnt_off000118c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C1 10484 bytes
SHA-256: b19d76dbca2322a5e6986734fd172282342c94b645fdfc29dd4cce94d55bb509

Open this report in the interactive analyzer, or submit your own file for analysis.