Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bc2a64624f543b…

MALICIOUS

PDF

79.0 KB Created: 2021-02-23 12:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2c0128700455a0eed95770eb199b952f SHA-1: e83b4d6f53e6f194292f78ed7817cbb3b9dd77fc SHA-256: 64bc2a64624f543bc0f0a0424f20583997a6efd4a7f8891e4bf3f2af95ae801c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or use link farms, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/strik?utm_term=how+to+factory+reset+a+honeywell+wifi+thermostat PDF link annotation
    • https://cdn.sqhk.co/disumuneriva/cigrPhj/vomit_comet_cost_uk.pdfIn PDF document text
    • http://ing-cliente.com/870292609056ftd4.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/tyjdjc0/star_wars_canon_timeline_with_years.pdfIn PDF document text
    • http://santaparker.store/time_attendance_software_free_crackbhkpk.pdfIn PDF document text
    • http://zhigina.ru/24010739522i7uet.pdfIn PDF document text
    • http://matroskin.space/overlord_shalltear_vs_platinum_dragon_lord_episodep50vv.pdfIn PDF document text
    • https://riwinimogo.weebly.com/uploads/1/3/0/9/130969841/laresidew.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jdickVS/jetaudio_hd_music_player_plus_apk_full.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/gijo44d/ligejidunezowobe.pdfIn PDF document text
    • https://cdn.sqhk.co/mafokesaxuvi/VMGdnfx/chores_in_spanish_means.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sagotomagin/adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/indian_army_logo_hd_wallpapers.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/afcat_2017_answer_key_with_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/jumidevexipoju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 5064 bytes
SHA-256: b814cb1b2ba143247abaadf1d91750a0247659ec3793b4458cacac079da5a732
font_01_sfnt_off0000fc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 10668 bytes
SHA-256: f96281edab6d2685c7249201ed891c306f8f5da5dafe2fa902cde61561963cf5
font_02_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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