Malicious PDF — malware analysis report

Static analysis result for SHA-256 c377dee894664e5f…

MALICIOUS

PDF

73.7 KB Created: 2021-02-24 00:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 09a5d01a1d451d280dfab68e5d964e15 SHA-1: 0ec54b965c468b5ec393d3a1defa69e2965afd4d SHA-256: c377dee894664e5f8c7a3620a50fd11854de03d813f80e57bc7c5bcc268aa78b
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://maypoin.ru/strik?utm_term=julius+caesar+brutus+character+traits PDF link annotation
    • https://bonawuxuje.weebly.com/uploads/1/3/0/7/130776103/7412122.pdfIn PDF document text
    • http://itdiscount.pro/zerob1xjso.pdfIn PDF document text
    • https://vilifamizebu.weebly.com/uploads/1/3/4/6/134617150/leziwotigum-sezedegaguwofu-jelapo.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/kUiihhM/47280349861.pdfIn PDF document text
    • https://tumupapixukuju.weebly.com/uploads/1/3/4/8/134852222/7691073.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/4857553.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/velano.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/zuzizuzaze-kanad.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/ge7jhbR/36451795604.pdfIn PDF document text
    • https://xujufefar.weebly.com/uploads/1/3/1/4/131483110/miriturufitemiju.pdfIn PDF document text
    • http://topcreditscore.info/pixeleol8d5.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/tujeviwakirawu/private_video_from_facebook_to_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/13645825756.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/tamil_dubbed_hollywood_movies_link.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/timex_miami_chronograph_manual.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5016 bytes
SHA-256: 3415909fddb940379b67da781b0d25d84166bc21860ff834879ca251c7dd47f0
font_01_sfnt_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 10796 bytes
SHA-256: c64768aca10b5c9eb64a6b353e5672ab7e943d95c646f6ea488ce11511376789