Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb4bec534c575dc…

MALICIOUS

PDF

76.4 KB Created: 2021-03-01 03:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7370b5c32af866957ff1a31542edef04 SHA-1: 90dcf00a8c72dbd9848f620de2b54c53f70aaed8 SHA-256: bcb4bec534c575dcf4b6970bd6614a0b53c8832750694c8012876692b8a3542a
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://fokemale.ru/aws?utm_term=is+blackweb+a+good+brand+reddit PDF link annotation
    • http://fisujerekuvij.getenjoyment.net/c.s._lewis_mere_christianity_summary.pdfIn PDF document text
    • http://contentmedialiteracy.com/five_themes_of_geography_activityx6a0i.pdfIn PDF document text
    • https://fivosegexaf.weebly.com/uploads/1/3/2/6/132683078/dilekagukudafe.pdfIn PDF document text
    • https://gobewuguwug.weebly.com/uploads/1/3/6/0/136056794/449284.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/47938784853.pdfIn PDF document text
    • http://clebohets.xyz/bruno_mars_unorthodox_jukebox_downloqdxl7.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/sims_3_super_patch_mac.pdfIn PDF document text
    • https://gevexivojuler.weebly.com/uploads/1/3/4/4/134444242/taposi.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/lajexewozidu.pdfIn PDF document text
    • https://mixutexevegov.weebly.com/uploads/1/3/4/7/134706804/pegapukixi_pojapovem_negarobeviza.pdfIn PDF document text
    • http://trastenmyqort.online/english_crossword_puzzles_with_answerstpv87.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/78743978149.pdfIn PDF document text
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/purubuzoz_gevuvujazesod_xenakuwi.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/bexolamabad/static_electricity_charging_by_friction_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/22097997811.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/what_order_does_the_white_queen_books_go_in.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/19010736019.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/58876796766.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_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 5340 bytes
SHA-256: fd89db3dc990df68aab4dee1537c2434fd0b468eddea605d49ee2db7806b7560
font_01_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 11252 bytes
SHA-256: 56dfa229027f0b810bd0cd37f30c0a76715edc3f9c4931b3c664da7a90144587

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