Malicious PDF — malware analysis report

Static analysis result for SHA-256 274605a7a76e726a…

MALICIOUS

PDF

73.8 KB Created: 2021-02-22 15:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 56e7bf19474e2ccb12a051f68a2a6ab4 SHA-1: 0dcd28576f51245568def44df020fa8d1b394fbe SHA-256: 274605a7a76e726aa322353b4b8b3b323e5384128e4501c2922d79598b52318d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=sloan+flushmate+troubleshooting+guide PDF link annotation
    • http://verification-help.com/rizap5r8vq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_6015c46655fbb.pdfIn PDF document text
    • http://vigastlens.xyz/49403718670vvu2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417658/normal_5ff541b7790c0.pdfIn PDF document text
    • https://sinekamawo.weebly.com/uploads/1/3/0/7/130776883/1e337ef40.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/a33928efbc2f29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483586/normal_6003986c49c98.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/b16e8f06.pdfIn PDF document text
    • http://begemotiks.fun/925185050691j4nd.pdfIn PDF document text
    • https://zetidikusas.weebly.com/uploads/1/3/4/7/134740093/wotefivejenas_ropejugog.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/zobuwubedak/63333625656.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/browsec_for_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/pimuditewuzusasuposas.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/shanti_narayan_differential_calculus_book.pdfIn PDF document text
    • http://zavukazena.epizy.com/gumutazulewevifovozabe.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_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 5564 bytes
SHA-256: ff6face7e55256ddcef5da7d034feefb791ab8abefc300474fca53b87c56efee
font_01_sfnt_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 10500 bytes
SHA-256: dd7d9ce5608850f8e46ad95643d2cf795d47a2e0ce56f508573d5250cfb4d017