Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7e956ca66f9cff…

MALICIOUS

PDF

66.8 KB Created: 2021-02-18 08:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 54bf924a63787c1741ce85911ea9a491 SHA-1: 71da77721b379a769d74a2702b4ca5e93d8284be SHA-256: 4f7e956ca66f9cffa4ddacc70037a0b60344b7c62ba8145469d42a6136d86501
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=bissell+ready+clean+powerbrush+pet+parts In PDF document text
    • https://bukudemedu.weebly.com/uploads/1/3/1/4/131483547/gadokaniboletonobu.pdfIn PDF document text
    • https://newovedisi.weebly.com/uploads/1/3/5/3/135348170/dozodebalokagusokav.pdfIn PDF document text
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/gofigegusotibu_gamemuker_fadajo_jepojuv.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/soladuf-gofevipal-zukasara-xujexoporupamiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_6026ccb2d778b.pdfIn PDF document text
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/gajadilizusem_dilanewozu_tuxar_teboweniwe.pdfIn PDF document text
    • https://buvefejam.weebly.com/uploads/1/3/1/4/131453018/d6441aa83e5250.pdfIn PDF document text
    • https://moxujudafetofa.weebly.com/uploads/1/3/2/7/132712376/vibitofoweka.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/4661924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_600a847ae000d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469841/normal_6025c2547599d.pdfIn PDF document text
    • http://kalavar.xyz/reading_the_world_ideas_that_matter3wx38.pdfIn PDF document text
    • https://sozuxope.weebly.com/uploads/1/3/4/8/134873608/2954648.pdfIn PDF document text
    • https://dawawasokiju.weebly.com/uploads/1/3/1/4/131408838/5820908.pdfIn PDF document text
    • https://kitejunozog.weebly.com/uploads/1/3/4/3/134319277/3126232.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/gezetega/free_handwriting_practice_worksheets_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/cavite_mutiny_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/ambarish_kannada_songs_free.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_off0000c5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C2 5544 bytes
SHA-256: 36c7065534947cae7713f6ba1d0208d66b980c5f5282789a5a3716d2b2694422
font_01_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 10428 bytes
SHA-256: 00cb657c45b4fb93bdb887779fea531b547a4b2aa6361c17df419343983913a9

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