Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb93aaefa528282b…

MALICIOUS

PDF

69.3 KB Created: 2021-01-23 16:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fa91a61505e703d8bb18341bb029c867 SHA-1: 19c1962c167c10e6d331503580175f34357cf98c SHA-256: fb93aaefa528282baa70a617dd9791cbe85a68722672e8516fccf8e47900560e
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://maypoin.ru/aws?utm_term=adobe+acrobat+document%2528.+pdf+to+word+converter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469852/normal_60009ef745a8a.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/4925ea0c1553edc.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/xojafemori/all_baul_song_video.pdfIn PDF document text
    • http://puligop.epizy.com/a5_booklet_template_word_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/linux_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/ziwuditusisemewi.pdfIn PDF document text
    • http://nejovafejasujob.rf.gd/bisizerapatofonimigovef.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/royal_dutch_shell_annual_report_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/beast_master_ranger_5e_guide.pdfIn PDF document text
    • http://seromol.epizy.com/pink_panther_trombone_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/adelphoe_terencio.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/77275496548.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/therapy_interfering_behaviors_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/dawelazuf.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/nugexaboragek.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_off0000d1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F5 5484 bytes
SHA-256: 6dd2cc2192331fe038a9a3b9ea4555834702394a23ad3179ce2454f63ef0d624
font_01_sfnt_off0000e4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 10324 bytes
SHA-256: 99d50482dbb5ee60af0df830ee58fd06d1be665138f3b2f4121cb292a257c736