Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab511808a7f4f66…

MALICIOUS

PDF

77.6 KB Created: 2021-02-11 18:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f258bb7d55960fb34812eae0a4eb7407 SHA-1: 416f79e057dc1c732b7a871e48f6cc95e9c3d744 SHA-256: 6ab511808a7f4f6661bb80eef641ef8193fa197925dee588d1b2419e9914d451
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs pointing to various domains, suggesting it functions as a link farm or phishing lure. The presence of external URI indicators and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern. No scripts were extracted, but the sheer volume of links implies a high likelihood of directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=lifestyle+brands+a+guide+to+aspirational+marketing+pdf PDF link annotation
    • http://wdd13.ru/zodezetolijutazikirilifo3o08.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/zhaQj38/24298848280.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzememub/hfFgghe/84455798654.pdfIn PDF document text
    • http://bamitizelomodil.22web.org/everquest_progression_server_class_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/ijNUhfo/pomisesemob.pdfIn PDF document text
    • http://cheapkeys.site/fofopuxefumugosakaxnwuyp.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/hhjeAsE/7928230578.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/Ajf4cpj/down_of_zombie_survival_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/fjdc8PV/fagagurufepap.pdfIn PDF document text
    • http://zavodtriumf.com/408517239407z2k2.pdfIn PDF document text
    • http://giftcard-sale.store/bootstrap_templates_for_software_company_free8jvwx.pdfIn PDF document text
    • http://instapriz365.online/bblia_trinitrianat31nr.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/Aiggjjc/samovizi.pdfIn PDF document text
    • http://kepojitu.22web.org/3834520383.pdfIn PDF document text
    • http://steh-sistem.ru/heart_shaped_wedding_invitation_template_freebnrkv.pdfIn PDF document text
    • http://romeital.space/magunokegomukinelegedeqsb.pdfIn PDF document text
    • http://igonlinesupport.com/kaiser_permanente_careers_log_inpqa30.pdfIn PDF document text
    • http://politach.com/kdigo_guidelines_2018_akimtqnh.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
    • http://tafikepuvanotu.epizy.com/blackmart_alpha_apk_free_for_android.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/bully_pc_2006.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_off0000e38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 5488 bytes
SHA-256: d6019cd106fe1dc09759aaa3dac6993ea62c59a1cccceda47c40223c4248b563
font_01_sfnt_off0000f619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 10596 bytes
SHA-256: ee9dd0a913c1119c8d7fdf0e015ba2eaac00f817d51fe5e7a3602b0a36c12469
font_02_sfnt_off00011a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A59 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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