Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a7f812ae601802…

MALICIOUS

PDF

73.1 KB Created: 2021-01-18 23:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 43995136f373aa044bd25e86baf7e6d5 SHA-1: e19a48342a1363f65b7c5e464904ca4dd72dd230 SHA-256: 39a7f812ae601802eedcdca08b161e4a8c1f45d0ec70dd804ced7cfe2b9f892f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/wb?keyword=724%20area%20code%20zip%20code PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462066/normal_5fe509bdbbe2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5f8f07fe73c4b.pdfIn PDF document text
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/20db0.pdfIn PDF document text
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/3462502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_5fbc090f6fd3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_5fb29255edc83.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/1517e01d8618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369626/normal_5ff1b431d4384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449774/normal_5faeab19db2ac.pdfIn PDF document text
    • https://zejeranuko.weebly.com/uploads/1/3/4/6/134649068/3923524.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/webipejonavuv/42794638919.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/free_template_blogspot_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/80448572556.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/cessna_337_specs_and_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/pizezegadetapasapule.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/nirofivibudedozazefi.pdfIn PDF document text
    • http://revifobatuge.rf.gd/appetizer_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/pdf_to_kindle_format_converter_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_off0000e145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE145 5112 bytes
SHA-256: 25668e9302cf874707ff5f954a087e2c3143b86487fd6faf8906764f59b94d3e
font_01_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 10804 bytes
SHA-256: 02b44e5575f9a2bffce9af7e7bfeb64e2a909d63a0783f4c7b18ba5a3e2ec225