Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbda5e85e8e3412…

MALICIOUS

PDF

70.1 KB Created: 2021-02-07 21:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e7a55cf247d6f688d1ed2c859a0b402e SHA-1: cb0fc9324c57c15f5eb042ec2c6688eccc7bcaac SHA-256: bcbda5e85e8e341201a11db51b69c48f519e6ee09c70343c7a1f05495cbd4ed7
144 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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=video+cutter+and+joiner+apk+for+pc PDF link annotation
    • http://kuvesukide.iblogger.org/sazemek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384835/normal_60076f7df29ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_5fd724b6e461f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5fd96971b025b.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/fukepez/cas_disclosure_statement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/49045894510.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/mojexor.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/b._a._s._m_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/zafumodiba.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/facebook_mobile_dark_mode_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/aval_appadithan_movie_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/libel_suit_free_font.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/80924102850.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/equilateral_and_isosceles_triangles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/gewivef.pdfIn PDF document text
    • http://serinuzosazojup.epizy.com/mutisuxamowurosazawo.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/79071204526.pdfIn PDF document text
    • http://rifezovepon.rf.gd/mewawofagegovazefujodil.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_off0000d519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD519 5044 bytes
SHA-256: cc9c645f1ec1e4025c9e41ac83382f40aa984b5137a2d50fbb58fa9bf01dcfe6
font_01_sfnt_off0000e662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE662 10772 bytes
SHA-256: 6cfbacc21e71dba2a6f9b0667b436a9eebc3112d13058d042ddd069d88041a6d