Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f26cc164d004745…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 12:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b975f9b0dc4daf3d7fc3104c37296e3c SHA-1: 289580dbbdc16aa68cd58c5ef0ba2c8b2ff15139 SHA-256: 1f26cc164d004745eca6d8dbce6d01cb129c42d6300a5fb741e6966b689e1aa8
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://seumenha.ru/wix?keyword=epic+training+test+answers PDF link annotation
    • https://lamerosezikane.weebly.com/uploads/1/3/1/4/131411411/9105519d713651.pdfIn PDF document text
    • https://rixatesar.weebly.com/uploads/1/3/1/8/131871899/7393257.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375087/normal_6008a09874505.pdfIn PDF document text
    • https://jupisururixed.weebly.com/uploads/1/3/4/3/134339091/8415324.pdfIn PDF document text
    • https://xobijuveja.weebly.com/uploads/1/3/1/6/131606615/4d9469c.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/3939242.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/vabigugiwi_nesip_fadawa.pdfIn PDF document text
    • http://mexicotop.xyz/weekly_meal_planner_template_word1xvsf.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/lizeger.pdfIn PDF document text
    • http://loginwithfb.site/ti-36x_solar_guidebooknexha.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/mesotodimus/sufefopixixinimuge.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/i_can_see_you_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/chitra_film_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/rinavutujumob.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/indian_army_commando_wallpaper.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_off0000e230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE230 5116 bytes
SHA-256: 529526d28d63787adce5bf5d6d659f8425b54988c5e1ef51339b878f59e981a0
font_01_sfnt_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 10596 bytes
SHA-256: 1bb6c2f7e4c95b04db84a2636cf602a4d4931093adba397b028803086a4acc42

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