Malicious PDF — malware analysis report

Static analysis result for SHA-256 91023dfc1cbe939c…

MALICIOUS

PDF

63.7 KB Created: 2021-02-07 00:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8ab1a97d2a69c707154627d56eb13187 SHA-1: afddc0e48ebaa63fcc0e1f3b6c2bb9abcf33a1b4 SHA-256: 91023dfc1cbe939ce7373de6b0c5933579697dec6e90eb223e5a876151981903
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=going+merry+one+piece+action+figure PDF link annotation
    • http://proita.space/futajobesivoduxewenobup13h72.pdfIn PDF document text
    • https://siwevamad.weebly.com/uploads/1/3/1/8/131871433/7889750.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/6f9a95519c5a.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/2g7ChgK/download_instagram_chat_messenger.pdfIn PDF document text
    • https://pesenulowujef.weebly.com/uploads/1/3/5/3/135325158/10b8b.pdfIn PDF document text
    • http://leqqurint.online/lupozeweiul4s.pdfIn PDF document text
    • https://jekakakum.weebly.com/uploads/1/3/0/9/130969489/f130ff.pdfIn PDF document text
    • https://pakupefo.weebly.com/uploads/1/3/0/7/130776676/2510159.pdfIn PDF document text
    • http://lngcliente.com/bipavutufiradevefenovi4zrqh.pdfIn PDF document text
    • http://mixed-rootwork.com/tigokiliroribojixcz14.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/cquhbhf/59251202771.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/iigeW52/ritewewadoxubijuru.pdfIn PDF document text
    • http://fitness-ital.fun/finger_labyrinthgzwl0.pdfIn PDF document text
    • https://jimutovila.weebly.com/uploads/1/3/1/8/131856698/f4b7a79e91a10e.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/fapaga/local_template_variable_angular_2.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_off0000c1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B2 5260 bytes
SHA-256: aa1a89c9db3de017cb8b29c1716c97264218a16605669b64466b3283293c2ef1
font_01_sfnt_off0000d394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD394 8900 bytes
SHA-256: 7855be28a8cf68e65179edc1cb78207085fe90f96fae6999f3bdbeb901525f0b