Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75b58c8a81595b7…

MALICIOUS

PDF

75.4 KB Created: 2021-03-09 10:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d1739e6209b7a9e18c00278c70e904ed SHA-1: 4811b17824e02c7a13ce3fc08fcdab0f3a2dd424 SHA-256: c75b58c8a81595b7aab799f7af6ddef22ccf041b11e38af5764c11d4e4db7aae
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of external URIs and a link farm heuristic suggests the document is designed to redirect users to potentially harmful sites. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document uses a deceptive call-to-action to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=abbi+glines+existence+pdf+download PDF link annotation
    • http://xxlmature.site/is_ryobi_a_good_chainsaw218om.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_602679111fa7f.pdfIn PDF document text
    • http://bigno.space/34756800895nubk9.pdfIn PDF document text
    • http://banquepopulaire-fr.org/363325718235flst.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/651729861351koxt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5ff277806b9e5.pdfIn PDF document text
    • http://wedogadev.iblogger.org/properties_of_2d_shapes_worksheet_ks2.pdfIn PDF document text
    • http://stavki.link/2006_dodge_charger_rt_daytona_owners_manual8qx0b.pdfIn PDF document text
    • http://dontbeshy.xyz/werotivesejerikcr1hv.pdfIn PDF document text
    • http://hargotel.xyz/pitumebezuwewunuwa82b1r.pdfIn PDF document text
    • http://prizinsta24.online/php_code_for_website_designpuvmw.pdfIn PDF document text
    • http://teaitalis.space/sistema_muscular_humano_para_nios1h2ic.pdfIn PDF document text
    • http://yellownatural.space/3593982894mlyl7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_604152941e001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_6015fc6a64fed.pdfIn PDF document text
    • http://rimka.xyz/reference_letter_for_medical_office_managerw0sms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lilivuxaja.rf.gd/zixafezojuwapobadugef.pdfIn PDF document text
    • http://kagapari.rf.gd/88948999573.pdfIn PDF document text
    • http://sobumewupuvuve.epizy.com/wifakumamuxi.pdfIn PDF document text
    • http://zerakunutage.epizy.com/beauty_camera_apps_for_android.pdfIn PDF document text
    • http://nefigubisi.epizy.com/4746466793.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_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 5516 bytes
SHA-256: 50a9183d28e83727a9e0274cd788368cf2d2cc1498df44c57664249bebaae4db
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 10596 bytes
SHA-256: 68e81c1b651582d7a12088b3c18f0f2c28411706118e4ffb5e962fd495ecedc6

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