Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d56fd6349ecfee3…

MALICIOUS

PDF

67.4 KB Created: 2021-02-28 05:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 9d54306890d9ac371a3c39ca935c2b33 SHA-1: c13aa4d7c36a2ce9b066ce3010e357d369284e77 SHA-256: 3d56fd6349ecfee30b1933ff3efff4c33cb665adb783cbf63a1e58bec75246b2
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/award?keyword=how+to+draw+a+tree+house In PDF document text
    • https://cdn.sqhk.co/sufokorume/azURiby/67325272806.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/cisco_4200_series_router.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/voniwafepupalugum.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/I4zijsr/jajinagowajo.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/58574735652.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/e1Hjihh/apple_music_family_plan_share_with_friends.pdfIn PDF document text
    • https://varozuwibudod.weebly.com/uploads/1/3/4/3/134327914/1598844.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/hfgjjec/delete_stickers_on_snapchat.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/bajuse/terikizim.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/vubebu.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/org._apache._kafka._clients._consumer_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/22657477792.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/pagopob.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_off0000ceb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 4936 bytes
SHA-256: c7786d133b48ae7bf0e60dcbf6949733f41b7b3935efd2ed84b0487a4d62015e
font_01_sfnt_off0000df7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7D 9848 bytes
SHA-256: cb54358af728a1b662bfe8a33cbf9a55425975770550dd48630153e12c1e2ee7