Malicious PDF — malware analysis report

Static analysis result for SHA-256 525411b1358fdac5…

MALICIOUS

PDF

71.2 KB Created: 2021-02-22 06:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3533c9a228848525da0366b8959d52a9 SHA-1: 1b055982f777f43bf9316b510d6c98b38c63f4f1 SHA-256: 525411b1358fdac5c19c2b17ad75d2273d1ed3d089579deded7659dae0066b91
204 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=pokemon+go+gps+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447878/normal_600691dc0090f.pdfIn PDF document text
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/xadumazonin-vivuzawu.pdfIn PDF document text
    • https://zeruwowigewal.weebly.com/uploads/1/3/0/8/130813736/1525342.pdfIn PDF document text
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/8691427.pdfIn PDF document text
    • https://cdn.sqhk.co/lasotepana/gi0icsw/go_kart_buggy_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/cPNheAu/conspiracy_movie_2001_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/WW4Tfma/bounce_house_rentals_near_me_cheap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_6010b52235019.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/iajhkTF/strategy_property_management_detroit.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/davawina/756668431.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/bawunoratagosima.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/kubota_bx25d_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/veena_cassettes_rajasthani_video_songs_free.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_off0000db50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 5216 bytes
SHA-256: 072eea13d3e55b8a2ecf249d9730405b2bd2aa347a1336683623226584df123e
font_01_sfnt_off0000ed09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 10412 bytes
SHA-256: a5a4de67e1661916f0db7ac62c7c86bbb28ad21c5d86c087e2302fcc7f2b0779