Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f20d9ab0831c62…

MALICIOUS

PDF

79.6 KB Created: 2021-03-17 22:17:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a3273fb333cfaab993580bcfe96b1b31 SHA-1: 25d073121f59bd334d208e604d0f3ad240fe487c SHA-256: 56f20d9ab0831c62985fde1518a37e228c22130ee9d1d2e520bd61e67805a288
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://lozipotod.ru/strik?utm_term=baby+got+back+lyrics+meaning PDF link annotation
    • http://galoomer.online/21891057288l273c.pdfIn PDF document text
    • http://8bitbeardsco.com/proceso_metodologico_de_la_investigacion_cualitativanovda.pdfIn PDF document text
    • http://ledimpress.biz/923445837095vyq8.pdfIn PDF document text
    • http://on-arenas.com/40371153925tof86.pdfIn PDF document text
    • http://mexicotop3.xyz/809561089184a37v.pdfIn PDF document text
    • http://zoomita.fun/53652055307sbyto.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/buchungsstze_einfach_erklrt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421049/normal_6035885b609b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_601b9215b1833.pdfIn PDF document text
    • http://pixelbarista.com/canon_650d_firmware_update_downloadf3jdw.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/57440801425.pdfIn PDF document text
    • http://app-3null.com/dipiro_pharmacotherapy_10th_editionm26gm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449600/normal_5ff671b1ca50a.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://revudipepofaten.myartsonline.com/how_to_create_a_timeline_in_excel_with_start_and_end_dates.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_b35a0abaab414f4795f932b6536653cb.pdf?index=trueIn PDF document text
    • http://kavuduvolilazod.myartsonline.com/bernoulli_equation_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/juzub.pdfIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_829b6d2ee1af43568ad0be1384bf54cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/apa_style_guide_footnotes.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/9769575728.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/grand_chase_dimensional_chaser_lime_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/pijosutafuwemesera.pdfIn PDF document text
    • http://koxigumom.onlinewebshop.net/45442159616.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_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 5264 bytes
SHA-256: 4e8855b8625eeedcb5ac3993a4bdc9de51021fab963b97e5c4d09b9628bd3b8c
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 11136 bytes
SHA-256: 6e219ec8cf7cd2f824fd3ba11ddda28c868a02832e33c729bd828d1796a11f13
font_02_sfnt_off0001211b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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