Malicious PDF — malware analysis report

Static analysis result for SHA-256 d356bfdcb4817b86…

MALICIOUS

PDF

70.5 KB Created: 2021-02-23 23:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cb673e7d885293df2e33c822db5ebca0 SHA-1: 24f13f2e9ac1feed57bb2f75c9b33cea5e91092f SHA-256: d356bfdcb4817b86061d1f6e066f31549e6a81f512c7d545a2b60e2865a583f9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://maypoin.ru/aws?utm_term=nzxt+phantom+820+ebay PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376103/normal_5fffb90b9bc0f.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/iihtghv/fun_christmas_bingo_prizes.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/vevipodirepapuv_bijusivonetonew_lemunegilipogud.pdfIn PDF document text
    • http://fabulouss.space/xoluredoboragukibepunp314.pdfIn PDF document text
    • http://levelupguild.com/dometic_harrier_inverter_air_conditioner_manualva946.pdfIn PDF document text
    • http://ig-copyrightnotice.com/tugufododupasukafiri8x98g.pdfIn PDF document text
    • https://muwunijika.weebly.com/uploads/1/3/1/3/131398004/minafobekozopow-memikatigimune.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/iehdyky/femovojoverasogatulinafo.pdfIn PDF document text
    • https://mejonozawus.weebly.com/uploads/1/3/4/0/134016798/xujurogosinolul.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/xujuwoxewibus.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/gfic9v8/minecraft_java_edition_price_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5fde9efad2f03.pdfIn PDF document text
    • http://beach-fruit.fun/gofazum8nli.pdfIn PDF document text
    • https://zeleloda.weebly.com/uploads/1/3/0/7/130776222/2550304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipaliwabalutu.rf.gd/android_emulator_for_pc_xp.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_off0000d47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 5548 bytes
SHA-256: 49fd32d2cc77cdf52321bd4aaf35869cb44439076e23f7d65837abe7fc80e045
font_01_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 11100 bytes
SHA-256: 231f8c6d1895f8850de00f35ad618c5a3ab11e26c633ba9a0e58f66b1d96c609