Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a58ab19fc7a9b19…

MALICIOUS

PDF

70.4 KB Created: 2021-02-14 20:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 66f5b413d4c95fa4c053ccd2fe18399c SHA-1: 64890efa7a538b519841eabef34fb29aa1ea5476 SHA-256: 4a58ab19fc7a9b193d60cd64be49f0a5eb2be53237e2b02456cd718d4714a69c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=forever+income+clause+social+security PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480899/normal_5fe68c7147bb4.pdfIn PDF document text
    • http://ccckkkkk.space/3_letter_words_spelling_worksheetsb0vkw.pdfIn PDF document text
    • https://zunotexiru.weebly.com/uploads/1/3/4/8/134890048/dda108afcb84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422637/normal_5fdece59a358e.pdfIn PDF document text
    • http://latencfsrt.space/padma_purana_in_malayalamcy98u.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/xunuposuwusa-vizowuben-zamiwotopa-ledobiluxil.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/tumuwedalok.pdfIn PDF document text
    • http://fsbsiod.com/string._format_java_long0pmd7.pdfIn PDF document text
    • http://eurosett.net/722469531794uoc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_6007704652070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_60003f9e0cfe4.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/CAs5gin/1279535077.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/dezajok/jakunexolugojulobokev.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_off0000d551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD551 5064 bytes
SHA-256: e00754b22f42f67921ea3978357cfb65d151a11770ebc50615475772a98c597b
font_01_sfnt_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 11688 bytes
SHA-256: eb115fc5661f9aa1104a18dd415951461c408546a8350f0a0f79fdad824ac81e