Malicious PDF — malware analysis report

Static analysis result for SHA-256 672a875faa8f246b…

MALICIOUS

PDF

77.3 KB Created: 2021-02-26 22:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9d4aadd2bcc7ae896b34c1338eea2d4f SHA-1: b003c1ffb95b20132940b5b9722464d83cefeeb4 SHA-256: 672a875faa8f246b327eb1f38e2f266adfefde9ced6ae22b44e8a7177b558e36
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'golowaki.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource, aligning with spearphishing tactics.

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://golowaki.ru/123?utm_term=pretty+little+liars+season+1+episode+21+bg+subs PDF link annotation
    • http://kirakexig.mypressonline.com/78626858278.pdfIn PDF document text
    • http://ibkreactiva2020.com/logical_reasoning_questions_for_clatfhbzf.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/59883802055.pdfIn PDF document text
    • http://naturaitalia.space/cdc_guideline_for_malaria_prophylaxistnpmv.pdfIn PDF document text
    • http://vizionsmc.net/86457947913vrru7.pdfIn PDF document text
    • http://zoomita.fun/badipiluuzf72.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/how_to_write_an_introduction_paragraph_for_a_rhetorical_analysis.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/pusago2fo8m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepagewav.atwebpages.com/advanced_engineering_mathematics_9th_edition_erwin_kreyszig.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/how_do_you_update_kindle_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/63541779461.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/lalokut.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/25370809621.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/goses.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/jasipelaxikano.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_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 5552 bytes
SHA-256: 3814b0b4640204303b2322d07ecd987c08a96784540da383d7ee26717214cf22
font_01_sfnt_off00010362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 10616 bytes
SHA-256: b201a3de0fa961717071611f535ab4b45b7da6624a8b16a8f5dcbde039580f21

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