Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1c1480e60aa0aa…

MALICIOUS

PDF

82.3 KB Created: 2021-03-04 02:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 33c6463ff0fe4db978b0347025e5798c SHA-1: a4b48b9b1bc8b7be27749fbc64d696e5d37f5d9c SHA-256: 4c1c1480e60aa0aad0558149b3892fd6874c6439ffaa93db66eeea9112519be2
216 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and ClamAV detection. It contains numerous external links, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the ML classifier output strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kavisovilige.weebly.com/uploads/1/3/5/3/135308643/suxiga.pdf.
  • 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/wix?keyword=msp+hack+download+no+survey PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485440/normal_60070ba7927f3.pdfIn PDF document text
    • https://kavisovilige.weebly.com/uploads/1/3/5/3/135308643/suxiga.pdfIn PDF document text
    • http://wimazufeb.iblogger.org/142301056.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494435/normal_5fc676cb102fe.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/why_is_my_smoke_alarm_chirping_after_changing_the_battery.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/16124505696.pdfIn PDF document text
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/mugujax_kaxojukobi_wobutibeba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fdd9570c5040.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_600111859b7c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5ff3b69b65467.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/76d9db7dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_601190dd7648d.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/f5efcb35f91a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lovetijif/adobe_after_effects_templates_text.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/how_to_make_a_log_splitter_with_a_hydraulic_jack.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/facebook_data_messages.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/free_kindergarten_reading_comprehension_worksheets.pdfIn PDF document text
    • http://pewulalabes.epizy.com/bewejigira.pdfIn PDF document text
    • http://mojedebebetum.epizy.com/hardball_imdb_parents_guide.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/the_christmas_carol_jim_carrey_cast.pdfIn PDF document text
    • http://dagaratula.rf.gd/juxepatupuxulet.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_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 5484 bytes
SHA-256: 8ea5262995d59aac1c329eee3faf06fa6a9179f2118bd5821d2ede31052240c9
font_01_sfnt_off000118b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B2 10264 bytes
SHA-256: 7c8f0b5359dbb0056af3f25f554d7e4ff9508ca5dc103e2a52117a1dc4bf71ac

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