Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70a1a650a05b2d4…

MALICIOUS

PDF

78.3 KB Created: 2021-03-02 00:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 66c81038bc0742412e61bd3ad4f763f8 SHA-1: 08cc0707fe0c5f7ccc05f8ff022677a24f3d869c SHA-256: c70a1a650a05b2d4ccb08816a131ba0a5afbf4024575f6e3426bbef71e72971f
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://dugedepap.ru/wix?keyword=eeoc+intake+questionnaire PDF link annotation
    • https://tovumanaxi.weebly.com/uploads/1/3/5/3/135392352/bimezob.pdfIn PDF document text
    • https://nevedaroxizewav.weebly.com/uploads/1/3/4/5/134592578/kagebuxugupoj.pdfIn PDF document text
    • http://zobebukore.22web.org/keto_diet_meal_plan_free.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/2381836.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/jVmghie/miwibijixonusetagi.pdfIn PDF document text
    • https://nubesojobe.weebly.com/uploads/1/3/1/3/131398221/2552665.pdfIn PDF document text
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/c46d9a.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/muxegeza/buxor.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/62309883582.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/stoke_newington_sixth_form_timetable.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/crosswords_with_friends_answers_8_13_19.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/41508604976.pdfIn PDF document text
    • http://rebikesumusosu.rf.gd/manual_variador_yaskawa_j1000_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/math_worksheets_multiplying_with_decimals.pdfIn PDF document text
    • http://bivezekamolekaz.rf.gd/novejubuxanibidejedipamo.pdfIn PDF document text
    • http://lodajozaki.rf.gd/valoracion_apgar.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/mikuledasudobagit.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/82965770509.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_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 4908 bytes
SHA-256: a9471d1c8754869ac20b32270bdd26f57bc301f70c7edeeba5faf4f79da6364f
font_01_sfnt_off000107a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 10824 bytes
SHA-256: a9626f0fb8aa536c5271456a0bbe238a821be5a3dc7c47c60019e215a2a65846

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