Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe5e2f67a0a6789…

MALICIOUS

PDF

72.2 KB Created: 2021-02-13 17:14:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 920618d7e0efa78bb9a4ef5143ec335c SHA-1: 7f661df7310fd2788b5739de92bd50ed126e2292 SHA-256: fbe5e2f67a0a6789a282eb7b9ddbdbb6896a761ac36b0e7140ec9def6739cb95
244 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=english+1+semester+exam+study+guide In PDF document text
    • http://vitedotom.iblogger.org/simple_delivery_note_template_xls.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/1jgoiip/rgb_led_strip_remote_control_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/ifSFPmn/xajabatutizirovufumabu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383308/normal_60088d2191f08.pdfIn PDF document text
    • https://pekonupag.weebly.com/uploads/1/3/2/7/132741447/luxizu_baxusegagaxovez.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ighjjja/wizajuwabasodimigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379371/normal_601cb7e64147f.pdfIn PDF document text
    • https://guvoladedesu.weebly.com/uploads/1/3/1/4/131453897/segebosadutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd2ecf949e52.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/4381032.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/e305197.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/gfiiVHv/strategic_advertising_management_5th_edition_ebook.pdfIn PDF document text
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/48b583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473023/normal_60215fbf64bf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390056/normal_6002fc686490f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waverotefiwob.epizy.com/sicherer_anonymer_browser_android.pdfIn PDF document text
    • http://pajogapusifured.rf.gd/wolutoza.pdfIn PDF document text
    • http://dukazel.rf.gd/mokadumonafiwaxibotegidut.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_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 5416 bytes
SHA-256: 762bd7cbe5835e8ef5c82b8edde56e329db6f5f4f151a7d84f5232590bf2668e
font_01_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 9964 bytes
SHA-256: 2cef47fa95223f9fe6130487cdf8c4d2366abe59f2783dcf9ad9c30a8a711fbf

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