Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca8ae23dd4911a2…

MALICIOUS

PDF

73.4 KB Created: 2021-02-02 21:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 521da859b3bf7a0a312cccdb601e4ac1 SHA-1: 47ec33df7a63da45b7f0ae608ca748169738d6d3 SHA-256: aca8ae23dd4911a24d5c333cf9e0d1c8a7d3e71dcb5f941d8cfec8b41019a02d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://maypoin.ru/aws?utm_term=alfred+2+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488817/normal_5fda2780316c8.pdfIn PDF document text
    • https://wigabededonekan.weebly.com/uploads/1/3/0/7/130740374/wigirimux.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/feXhe1k/gibevuwijenadote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5ffaabecabcda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fce237c4cc72.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/ejagcqz/space_shuttle_columbia_disaster_risk_management.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/jiVyifo/elements_massage_scottsdale_arizona.pdfIn PDF document text
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/jegokulemazeduguteke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fee1d01e04e8.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/bififafolete-podelazodonab-luzipub-kewotadizeb.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/igojeUM/25422499981.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/jepavilutabilel/15799956375.pdfIn PDF document text
    • http://potubavaziripek.epizy.com/39565652341.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/hungry_shark_evolution_mod_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/91070957361.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/brazil_fifa_world_cup_song.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/use_the_word_answerability_in_a_sentence.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/life_reptiles_and_amphibians_worksheet_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_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 4976 bytes
SHA-256: 7f36267112824016d2a316adb7dfba4b1fdd3232f764deff72f4399033a18724
font_01_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 10372 bytes
SHA-256: 755823a0c9adaa674ca7b99456caee3bb4f4dce01cccb96ac0d39438b6f7f23c

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