Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c96d421bfc155f…

MALICIOUS

PDF

78.3 KB Created: 2021-03-30 03:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 65c1909a2e542fe849f625d03a46f008 SHA-1: a5c7ae6bedb9b9c9ad776f7eaad3584dcbaf2bf6 SHA-256: 30c96d421bfc155f1c3d9deb4d198ea33e4b584fdd4c9f8fc13b9da31aef614a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or SEO link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious or spam content. The ClamAV detection further supports its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://resalured.ru/award?keyword=hybridization+examples+pdf PDF link annotation
    • https://cdn.sqhk.co/wodaximewule/lWxibfa/free_wifi_hotspot_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/eicgehg/.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_602984ab61303.pdfIn PDF document text
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/8820548.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/water_pollution_in_malayalam_language.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/hc2ugcT/gemukada.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/jFKicLD/dosinanelunivefi.pdfIn PDF document text
    • http://thecabinets.xyz/xodurmyq3q.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/cDqgj4c/48666936370.pdfIn PDF document text
    • https://tujazemedup.weebly.com/uploads/1/3/4/4/134473975/1386323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_603dfb0b50c64.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/iE8nt76/bollywood_party_songs_2019_mp3_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zumovinej/jjhNPhi/kosenogokurazutimilir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_5fe7909925e4d.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/ADB2jdJ/ghost_rider_cardboard_bike.pdfIn PDF document text
    • http://ideaita.fun/how_to_become_a_medical_service_corps_officer1a4up.pdfIn PDF document text
    • https://vagofavom.weebly.com/uploads/1/3/4/4/134486407/66a42eb4069.pdfIn PDF document text
    • http://opencabinets.xyz/what_are_the_10_most_common_fears_society_hassaou8.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/hdgicjb/video_monitor_with_hdmi_input.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_602898148e173.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/jihlR5Y/deadfire_fury_multiclass.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mozaninukokefef.onlinewebshop.net/kemojisijonorisekovo.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_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 5508 bytes
SHA-256: 8d527ba6c43fc27be361c64ee60b94db2ec6ad394e595e789c30325f758ec2c1
font_01_sfnt_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 12808 bytes
SHA-256: 72d42d53af0b6bb49b60b250e44601fdb74be0f868bbbd9e1a269c041369fd4e

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