Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1620c0edc87896…

MALICIOUS

PDF

77.7 KB Created: 2021-04-12 21:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ee7ef3bb07e92bbca213ca61596949a1 SHA-1: 2684e4f0c37a8e4e006b2d8b2fa44e43e421a638 SHA-256: fe1620c0edc87896edeb5d60887612a4eeec1d2ea01a6b549fe479ebeef85337
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

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://pelibifir.ru/strik?utm_term=kubla+khan+summary+analysis PDF link annotation
    • http://jelolizabuvixi.22web.org/jirerobidimik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_604ddd1d06580.pdfIn PDF document text
    • http://vizilamu.22web.org/cancer_de_prostata_causas_y_sintomas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_604710ef6b1aa.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/plural_nouns_esl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473047/normal_5ff90cb20b4cf.pdfIn PDF document text
    • http://dedaruk.scienceontheweb.net/72279648129.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/bewop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_603e378c1eb0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giserokusifuzi.epizy.com/5360491864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd777b30-df8a-4728-b4b4-77437f85fb7e/musimudofepuposavefuwevef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089549c7-6f48-435c-bcd2-e9c850c2c389/gijadalatizibevef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3902258-1d58-4dc1-88d4-69b6969ea069/kolopawamozusalurusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8ded81-72d9-493a-a70a-fbd052ecd287/how_to_register_canon_printer_for_warranty_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a3e327-a8a0-439e-8396-6336b7dba1e0/63974101828.pdfIn PDF document text
    • http://rojapamun.epizy.com/80283914499.pdfIn PDF document text
    • http://bulumufojade.rf.gd/appsc_group_2_notification_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afba7d6-e702-460a-a733-5fcb41107f1c/biluriwiva.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/aquelarre_cervera_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782b7e90-da7b-471e-9a3c-ffa93e75ca69/sanyo_32_inch_led_tv_manual.pdfIn PDF document text
    • http://bekonoxidolu.rf.gd/3470576226.pdfIn PDF document text
    • http://wadepexarupuwa.rf.gd/juxogepigarix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501ef59f-1bb9-4a39-a867-7eed0236d300/38101277351.pdfIn PDF document text
    • http://wumipuxupixak.epizy.com/alimentos_permitidos_para_diabeticos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cab5e25-8b4c-4bfe-8432-e392436c2432/jewulilule.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_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 5200 bytes
SHA-256: 7463f17c3df70e2f21e4d19c9bdcbe08d0a7cbbd2638877473067a488e2c4195
font_01_sfnt_off00010477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10477 10836 bytes
SHA-256: ff4333d4d6cf7770e249caf3b612676439dd3543bbb9eabbf03c228eab277831