Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdf0f7f5e2e124e…

MALICIOUS

PDF

73.9 KB Created: 2021-02-27 21:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 371f824d18617aa2f1a507cb446d7913 SHA-1: 4d4ef9c8065b93eb23e86af4985cf018835bcc7c SHA-256: fcdf0f7f5e2e124ed42ec52ebcf72d0d76014b8fd4a9bbf9f957cc638c3d6da7
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/aws?utm_term=iowa+code+232.28 In PDF document text
    • https://cdn.sqhk.co/xiwasazafu/jbjaW3j/mazurisojakakawogelomiki.pdfIn PDF document text
    • https://xudiruxi.weebly.com/uploads/1/3/4/6/134630049/289f04780.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/100_most_common_spanish_words_quizlet.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/52839965278.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/Jgdqrq7/24620217184.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/3551592.pdfIn PDF document text
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/sipomafesozan.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/8802854.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/53592936924.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/foseneviwumedisar.pdfIn PDF document text
    • https://koreperuk.weebly.com/uploads/1/3/2/6/132680900/5760653.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubelifijam.atwebpages.com/fosowatovazum.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/42867937795.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/42690110710.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/37121386817.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_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 5180 bytes
SHA-256: b30892aa84b956bab65709963f9c717d3170aed316e5ea6d9c17d2d8a1e53d53
font_01_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 9868 bytes
SHA-256: 9ae6da878b50a3fc7209f6f6d3efed91fa750363b537d8f44fcc9f21a1a6091d