Malicious PDF — malware analysis report

Static analysis result for SHA-256 69700c89408d7e60…

MALICIOUS

PDF

67.2 KB Created: 2021-02-17 18:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2c7d0f8e641ab9be574f006c09952697 SHA-1: b8754631ed8c6e8134d07f2bca0a41f7b976f41a SHA-256: 69700c89408d7e60192b27d3473748c5c8ec921245bc64ecf95363ff8d702823
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://yafferge.ru/wix?keyword=diffusion+through+a+membrane+lab+worksheet In PDF document text
    • https://cdn.sqhk.co/rakapuvad/3boOid6/26524080301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490739/normal_6008af2e7f86d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_60078a4e157a6.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/cc1a82a1b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387819/normal_5fe550cd6d094.pdfIn PDF document text
    • https://pamezupiv.weebly.com/uploads/1/3/0/7/130775156/pinoja-xodanexogijib.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/hbdidCr/96967765324.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/highGHr/knife_fruit_hit_master.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/gezizefefififa/chevalier_college_performing_arts_centre.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/teori_perkembangan_behavioristik.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/workplace_employee_incident_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/74233319551.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_off0000caae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAE 5476 bytes
SHA-256: c60c7968b330d44bb7620348dc5ce904144be2343d67e6aa91cecf4b259635d3
font_01_sfnt_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 10112 bytes
SHA-256: 54af3b6c72b16a0dce85a03f7ee8a459dcb747e78004c47efe2ed53fe3433804