Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40023ab12202cab…

MALICIOUS

PDF

45.0 KB Created: 2020-11-01 22:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b0139dad47ced19bc9a3066746a6d850 SHA-1: d2fa33a8653e929c9454f3430de33406825ac088 SHA-256: c40023ab12202cabc3294d193dde668c99f6f897b90d09e3e428472ad0163008
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.me/123?keyword=download+block+launcher+apk In PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/c693694562.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/lafulovenege-nixirexo-vorabereb.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/9bc03c10e7d1.pdfIn PDF document text
    • https://jaregufadux.weebly.com/uploads/1/3/4/0/134016720/zitadonivoxadux_wivaxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/phrasal_verbs_exercises_with_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f48987d1-b3a5-4a83-a41b-76d8d1646190/1997_camero_ss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0287/6594/6033/files/little_big_planet_3_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1087/4301/files/complete_spanish_grammar_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1256/9247/files/myaarpmedicare.com_drug_list_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4194/6276/files/ecosystem_worksheet_free_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/newburgh_beacon_ferry_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c481e847-86b9-411d-afd7-90b7e8fad0fe/xepovavesisenolozud.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/horse_riding_quiz_questions_and_answers.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_off00006e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7F 5280 bytes
SHA-256: 10263edf6c86593062d156fd6b2cb0b9ad2257f6b4378dc749327c20fd5785a7
font_01_sfnt_off00008080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8080 11852 bytes
SHA-256: 2417bfeb723f725f775e5b6c469f995dbb13595aab1e50e5a91d275d578d5b7b

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