Malicious PDF — malware analysis report

Static analysis result for SHA-256 11166b630b034e61…

MALICIOUS

PDF

69.5 KB Created: 2021-02-14 17:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0d4fe9108a8eb6ed4232074cc7c87a65 SHA-1: 956285178052682f979cd9c926c173c73e4deeff SHA-256: 11166b630b034e61f25bbb8067789d70c4c95dbcfbf470c6de9a107e0fcdcaf2
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/123?utm_term=salem+sabres+soccer PDF link annotation
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/b852ee4297f.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/i5ij8jb/juxemekoxeguvipok.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/japukovupiva_suvesine_dolufaxabagad.pdfIn PDF document text
    • https://cdn.sqhk.co/kokijunuxagi/gVhJihK/monkey_preschool_lunchbox_apk_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/6iaja2K/new_guitar_ringtones_free_download_mp3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422392/normal_5ffc8ae48d997.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/31ab0996cc55c.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/rhgii1R/the_last_stand_sabaton_lyrics.pdfIn PDF document text
    • https://femerofuvarilef.weebly.com/uploads/1/3/4/0/134012326/jixidejutabov.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/wizuluworafid/chieta_bursary_application_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/javascript_submit_form_ajax_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/professional_cv_maker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/lagu_senorita_original_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/25589221331.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/feneludomitugimamadakarif.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_off0000d472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD472 5188 bytes
SHA-256: 0ce0cff9d1f9242f3bde0be5f4b4cbce2bc7853d2bde2b46364b430115a87c76
font_01_sfnt_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 10496 bytes
SHA-256: 7c3c2cc62cb19c0a4edc05241addcd9f690d4ca89c646f4d4ad6a4070c081205