Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a746d806d3d60f…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 06:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 448d9a47d88cc7a96918e20a201a50f9 SHA-1: dce7f3cb25a0e738b7e48e3ed7a73caf23fd787d SHA-256: 18a746d806d3d60ff026a53876445f910a24b7ba0fde0d2562289126b8fc7d98
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jacksth.ru/award?keyword=reddit+pokemon+go+promo+codes+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5fdef53926e48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459941/normal_5fee7e7271eb4.pdfIn PDF document text
    • https://pijaremurepapo.weebly.com/uploads/1/3/1/4/131406688/5042661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5fdfa6cf680b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5fc8432f553c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5fc691845c4b7.pdfIn PDF document text
    • http://jojenulowivot.22web.org/82416889027.pdfIn PDF document text
    • https://kisimerib.weebly.com/uploads/1/3/4/6/134697331/8184051.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5fc8b3f0e1786.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455178/normal_5fe4314527911.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/7d0fd335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_5fee0d8f8c11e.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/jekifat.pdfIn PDF document text
    • http://memokepudag.iblogger.org/anydesk_android_waiting_for_image.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/mokixetat/66500055420.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/ap_english_language_practice_test_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/epl_bleacher_report_arsenal.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/emotional_status_video_female_version.pdfIn PDF document text
    • http://dovobol.epizy.com/adobe_premiere_pro_cs4_classroom_in_a_book_download.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_off0000dedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDF 5496 bytes
SHA-256: 1d798a631b07186dda3ccb18b0f0c70de65aee02b703464e3aff4b36bf83d5d1
font_01_sfnt_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 10384 bytes
SHA-256: ed690f297b9157088acb70376de308807be5756a26a2c045de5856eb0b37ecab