Malicious PDF — malware analysis report

Static analysis result for SHA-256 54357e5d40bd8a8a…

MALICIOUS

PDF

83.9 KB Created: 2021-03-21 12:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a9fde49793550eb86b54023362fa9642 SHA-1: aca0a6c63cdcd2a3804b41c28101fd0a7a11d3e5 SHA-256: 54357e5d40bd8a8a5f0f8adae9c8f1beb48ebb4bc971cac0f93d3a3032415a34
156 Risk Score

Malware Insights

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

The PDF contains a link farm and an external URI pointing to a suspicious domain, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a common phishing or malware delivery technique.

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 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://midufefew.ru/strik?utm_term=multiwii+helicopter+setup PDF link annotation
    • https://zasoliwex.weebly.com/uploads/1/3/5/3/135318241/ebafd.pdfIn PDF document text
    • https://tojalalegeb.weebly.com/uploads/1/3/4/5/134584715/1064242.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/19315845162.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/5b9c83d3f3e.pdfIn PDF document text
    • https://dadotetixaj.weebly.com/uploads/1/3/4/4/134404583/nurab.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/un_behindertenrechtskonvention_englisch.pdfIn PDF document text
    • https://marikikugawu.weebly.com/uploads/1/3/5/3/135326377/8262834.pdfIn PDF document text
    • https://tatonipek.weebly.com/uploads/1/3/4/8/134874136/2531072.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/nezanurugega/bugeloxusoju.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/pakegamezazipebosim.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/android_tv_app_store_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/guruz.pdfIn PDF document text
    • http://givinedefadedi.rf.gd/79356448692.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/sports_day_invitation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/11928915007.pdfIn PDF document text
    • http://fegozewusesib.rf.gd/plant_taxonomy_and_systematics_book.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/business_psychology_colors.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/short_summary_of_romeo_and_juliet_act_1.pdfIn PDF document text
    • http://rogomore.myartsonline.com/95150578317.pdfIn PDF document text
    • http://bezepegu.epizy.com/7638374965.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_off0000facf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 4684 bytes
SHA-256: fa20c09adeef30d86069f9d116b98075efddc0f0b910c8c4298747e05fc66bf2
font_01_sfnt_off00010ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 11592 bytes
SHA-256: edbd0d08f5e00e4a2241f21a74e76147b3c7b007d662d1a406be7ef7e49356c3
font_02_sfnt_off00013285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13285 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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