Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4be5342dc62950…

MALICIOUS

PDF

82.0 KB Created: 2021-03-21 04:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ebb626fc275e1532e93a2aa35fab2829 SHA-1: 6ecd8a5e0f9f7cc86091b2afccf31b25b12cbdd6 SHA-256: 4b4be5342dc62950250ba750ca1e7780d0c978f6e073509d6cfd9b7f24c31376
206 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ponafet.ru/strik?utm_term=calculus+single+variable+7th+edition+by+hughes-hallett+gleason+mccallum PDF link annotation
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/kudid.pdfIn PDF document text
    • https://ponuwusareti.weebly.com/uploads/1/3/1/6/131636782/wimiwokajedogi-sejulavipawot.pdfIn PDF document text
    • https://seruvukajobal.weebly.com/uploads/1/3/4/4/134479042/6887439.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/fawifujidasele.pdfIn PDF document text
    • http://mafagedokopi.iblogger.org/borderlands_2_krieg_melee_guide.pdfIn PDF document text
    • http://girameluxo.iblogger.org/domamobamosu.pdfIn PDF document text
    • https://wejusapud.weebly.com/uploads/1/3/4/6/134614256/5b5c0cc847.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/belajar_bahasa_cina.pdfIn PDF document text
    • http://fimewovoko.getenjoyment.net/algebra_2_common_core_holt_mcdougal.pdfIn PDF document text
    • http://milesnires.xyz/lacrosse_atomic_clock_manual_w86111lszx8.pdfIn PDF document text
    • http://upgrade4me.com/vowizonewebunscvuu.pdfIn PDF document text
    • http://fasad-dom.site/how_to_apply_pellon_987f_fusible_fleece4i69g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mebupeb.rf.gd/ielts_speaking_topics_with_answers_part_2.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_d3c97bda954141df8caa02d9c220b8df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/56453425398.pdfIn PDF document text
    • http://kiderirujefadag.epizy.com/91114503145.pdfIn PDF document text
    • http://pasulupumorowim.myartsonline.com/kemasutupo.pdfIn PDF document text
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_b1585701560141e1ad011d292e0d409f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/90051139470.pdfIn PDF document text
    • http://xowuzafojizoma.epizy.com/45874486577.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/55773566704.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/sinini.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_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 5672 bytes
SHA-256: f1d8c65e46381297ac36eeaf0961066a584ef3b95a9321b0adc431b8d2be726f
font_01_sfnt_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 11428 bytes
SHA-256: ee912053702ff27d4b95be4fb0c827c23fa46d0072f782a06757df82c57c47a3

Open this report in the interactive analyzer, or submit your own file for analysis.