Malicious PDF — malware analysis report

Static analysis result for SHA-256 417c78256875bd1a…

MALICIOUS

PDF

65.1 KB Created: 2021-02-21 22:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7d8c4f88122376ff917fb84e2e0486df SHA-1: 70364ceb4737fef4d21d1d0c2b19212da0c67e15 SHA-256: 417c78256875bd1aca8a3c9d46ebeab444132a61760a97c7dc4f363ccae28822
196 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/123?utm_term=how+to+change+battery+in+dsc+motion+sensor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368752/normal_60078bb904a58.pdfIn PDF document text
    • https://tapevasazizile.weebly.com/uploads/1/3/1/4/131454670/pedumijovoxina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5ff84c54cf9dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_60183527cea3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417049/normal_5fc934bd73cfc.pdfIn PDF document text
    • https://tomumexajozovod.weebly.com/uploads/1/3/0/9/130969356/watunuvagoj.pdfIn PDF document text
    • http://lastmarkt.ru/angular_4_file_from_urlr7k6u.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/mcmi_iii_manuald1irr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_602ede708dd66.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/4931900.pdfIn PDF document text
    • http://arendaavto.taxi/coordination_chemistry_joan_ribas_gispertgxsg6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389824/normal_5fdfc359ef720.pdfIn PDF document text
    • http://spencermcman.us/jejerofixatinifasizaxuvxtq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fe0b8bb8e769.pdfIn PDF document text
    • http://help-igcopyright.xyz/56246992951ju6qd.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_off0000c309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC309 5616 bytes
SHA-256: a8d182e67b75cca1638235ba0e994186c2375faa1ac519ef8e8b580f541a8f38
font_01_sfnt_off0000d608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 9816 bytes
SHA-256: e382aa99cd6d00b2b0a9143565938aaacfd36dc41eb7074d9d27e15dff009a09