Malicious PDF — malware analysis report

Static analysis result for SHA-256 114ca494b7d56302…

MALICIOUS

PDF

62.9 KB Created: 2021-02-03 11:28:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: af11ec9f98ad5f4195e64af98d4a1476 SHA-1: e58a63902a5f6b8d20a52d55b5301ed390bf7691 SHA-256: 114ca494b7d563022d58823edbfa4feba2ed4e9546d89023428489dd38f00e05
254 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
  • 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://crophysi.ru/123?utm_term=continental+drift+activity+packet+map+answer+key In PDF document text
    • https://cdn.sqhk.co/xovatapegil/ZVhieaS/falelopikudimadujota.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/sonic_hacking_contest_2017n5n2s.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/ghMhdWe/91952174764.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/Hjdjiib/zawebarewe.pdfIn PDF document text
    • http://look-hotel.com/705559971661tncp.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/fDGhfgi/virtual_assistant_jobs_chicago.pdfIn PDF document text
    • http://beststudent.space/christian_bible_videos9f66f.pdfIn PDF document text
    • http://ueuniti.xyz/dwell_and_slumber_knock_off7tlxy.pdfIn PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/pisesitosisefogu.pdfIn PDF document text
    • http://igonlinesupport.com/44514126201si9kj.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/fPhf5hg/edmodo_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/ehejjgd/widimabebafafevak.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/Xiihcpi/facebook_messenger_search_in_conversation_not_working_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/3GjaLn3/putugazadabatud.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/YibjcVu/rijesegow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 5524 bytes
SHA-256: 732d363476301570fb8dd96b6a5ba8f928e7649eecf41c17ca2c6b117b8791f7
font_01_sfnt_off0000cda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA1 9604 bytes
SHA-256: 2c21ba2ca43972f09b3afcd9631ddf1071928b54df0b55e48c4809a1a4d39e57

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