Malicious PDF — malware analysis report

Static analysis result for SHA-256 c860c7ffd284bad2…

MALICIOUS

PDF

70.1 KB Created: 2021-03-22 17:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ee96cc7582d631440774f971f5e9691 SHA-1: 707194eff4aa962c2797081cf0071722da840fac SHA-256: c860c7ffd284bad2926f5b57859beb6d029f57ffca057f08b70f1ef1ad8c7ee1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, with the primary URL being `https://lozipotod.ru/123?utm_term=bold+text+android+programmatically`. The presence of numerous links suggests a link farm or phishing attempt, aiming to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://lozipotod.ru/123?utm_term=bold+text+android+programmatically
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/5804835.pdf
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/3649964.pdf
    • http://pemirok.22web.org/guxamilevi.pdf
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/barefeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sazasewugekupej.onlinewebshop.net/mushoku_tensei_wiki_rudeus.pdf
    • https://s3.amazonaws.com/fukepez/what_is_the_special_waste_product_of_anaerobic_metabolism_of_glucose.pdf
    • https://uploads.strikinglycdn.com/files/d72d72a5-4466-4dcb-8d2e-4311f7b18da9/33610224502.pdf
    • https://s3.amazonaws.com/regovadeje/serial_ccleaner_piriform_2018.pdf
    • http://ridupokibi.epizy.com/150_hp_johnson_fast_strike_for_sale.pdf
    • http://naxepatixotilu.rf.gd/business_plan_for_startup_software_company.pdf
    • https://s3.amazonaws.com/mukutud/97126894920.pdf
    • http://piwakitidi.onlinewebshop.net/wuvazarevijaselinaxeraba.pdf
    • https://s3.amazonaws.com/dikobepibelun/38942789910.pdf
    • https://uploads.strikinglycdn.com/files/2169d289-ab09-4037-bc12-5e606b21e459/one_year_bible_audio_nkjv.pdf
    • https://uploads.strikinglycdn.com/files/b1847858-9010-4134-bca5-93b92c74b501/damugele.pdf
    • https://uploads.strikinglycdn.com/files/1111d9da-2b58-4694-a9e8-a5b4bb750944/mtd_yard_machine_snowblower_parts_diagram.pdf
    • http://vanepozimor.rf.gd/barbarians_at_the_gate_espaol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e4.bin
ce840ae44bf79a5e1007e9a95f31d679cf5f6978605e4cc646c739a959030d52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E4 5436 bytes
font_01_sfnt_off0000e65d.bin
466d44ad2ff1e6b25ac98b2ede29751c433594bc936e21e2c92713f37ceeb5e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE65D 10820 bytes

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