Malicious PDF — malware analysis report

Static analysis result for SHA-256 90cfb93e4cd61923…

MALICIOUS

PDF

72.1 KB Created: 2021-02-25 01:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: dffd395264f8c89dc2fd79cafb0207da SHA-1: 3bdcd58e09f0d15f3d2de3b352e410e3ac373d45 SHA-256: 90cfb93e4cd61923232ae12a16fcf874eda1aef19cca199aa8a4b982e6e93368
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/award?keyword=gopro+hero+4+silver+4k+30fps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487432/normal_60188b01a24f4.pdfIn PDF document text
    • http://gelchlen.fun/solo_apk_for_android_9ficcr.pdfIn PDF document text
    • http://tibojisitixuno.22web.org/wadedukigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465144/normal_60338fb826596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_60038156166c6.pdfIn PDF document text
    • http://civiliscmq.online/767895552535li52.pdfIn PDF document text
    • http://gutufozif.iblogger.org/the_metamorphosis_sparknotes_chapter_1.pdfIn PDF document text
    • http://podarokinsta.online/minenekigopiwasabiseluvor0s1q3.pdfIn PDF document text
    • https://tudevapibor.weebly.com/uploads/1/3/4/8/134884273/tovodi_nezomud.pdfIn PDF document text
    • http://select-get.top/jinofexurilif66qnp.pdfIn PDF document text
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/9167992.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/bipirigifomulox-xisire-wizawaligarut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE08 5328 bytes
SHA-256: 726dfcc8fb9be728fc49252fe7d98feeaabb7b2995662a1ce0bbb60b570303cb
font_01_sfnt_off0000f03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 10436 bytes
SHA-256: 56d9e2a53487cb4342f19483c9597e9ca1f79a61b9082b78cb5fd230e818f19e