Malicious PDF — malware analysis report

Static analysis result for SHA-256 758de229d3500799…

MALICIOUS

PDF

78.6 KB Created: 2021-02-17 11:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e803f74b7f68d653052c83268e1ea753 SHA-1: 4e31f9c16d2ac7352aef03c61b11743d67cdf29d SHA-256: 758de229d3500799818ff348af2aa84961dbe36529e879df14b8fde8e37f8a6b
254 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.
  • 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://crophysi.ru/123?utm_term=leccion+189+aprendiendo+un+curso+de+milagros In PDF document text
    • https://roserilufelojow.weebly.com/uploads/1/3/1/8/131856860/1604372.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/ruwubujib.pdfIn PDF document text
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/2455922.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/cpBjapb/florida_statute_traffic_crash_definition.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/wetufenu_pubolopomezefaw_bafiwer.pdfIn PDF document text
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/173158.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinelak.rf.gd/facetime_call_shows_answered_on_another_device.pdfIn PDF document text
    • http://guvenaverelud.epizy.com/transparent_background_image_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/rawuwupebanirilivonar.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/android_police_sms_backup.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/43334916194.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/integral_calculus_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/show_battery_percentage_android_5._1.pdfIn PDF document text
    • http://rajunuximu.epizy.com/19802546183.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/apache_nifi_1._5.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_off0000f359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 5736 bytes
SHA-256: 1b00da2812b3421982dd3bbdf651ed5c143abfb5055ba3278058e13517768fac
font_01_sfnt_off000106d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 11324 bytes
SHA-256: 59129a81bfcb4210e4c0e607f12ac396cc0ff6f4ec3a91610bcb7851ccb43479