Malicious PDF — malware analysis report

Static analysis result for SHA-256 df68db4eab6b5369…

MALICIOUS

PDF

72.5 KB Created: 2021-02-17 18:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e357679afeaf82db68d11e3095891c97 SHA-1: 30ebcf41d1e55b66661e04b6086f55428164f4f0 SHA-256: df68db4eab6b5369e88999adf2d56901370a2a3b3ca7e44f88c39e0847222c5e
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://crophysi.ru/wix?keyword=garlind+ridge+collies In PDF document text
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/76ae7611fd76d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5fd6565d569b2.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/3454921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_601f5a935b934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5fec43fb6064c.pdfIn PDF document text
    • https://roderisagewap.weebly.com/uploads/1/3/4/5/134507489/lisodebap_fexevewisumoso_tabatiri_dowepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495838/normal_600da6db406a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418001/normal_60088091afabc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_601976bfea752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_602c5d66b3a9b.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/zifilobesumafi/commas_after_introductory_elements_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/tera_chumma_me_chyawanprash_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/agneepath_song_wapking.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/tajowo.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/60270774384.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/bootstrap_scrollspy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/prismatic_compass_survey_report.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_off0000df4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4F 5136 bytes
SHA-256: 158503ae5496bf5107b15f58dfa08391f738f0297e0141fc283e0ef5fed89ed3
font_01_sfnt_off0000f0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 10624 bytes
SHA-256: 4ff319ba22ae5bb2d66d9a68309febb6ed59cb8dda1cf5adb0a36802647c1a7d