Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29b1a3e88c3e373…

MALICIOUS

PDF

66.1 KB Created: 2020-12-01 20:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 31af11af3e37a553d2b07343bba9986a SHA-1: ea465a223327c70d118987ec2f0c342c21c39db6 SHA-256: d29b1a3e88c3e37329c8a98ca5d3a04514660665f93a48f43b3e6f639ebeb050
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://traffine.ru/wb?keyword=bulaklak%20song%20free In PDF document text
    • https://sikegupul.weebly.com/uploads/1/3/4/6/134681682/d801d4e9f99e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f8ed3d8f2388.pdfIn PDF document text
    • https://jisasulozif.weebly.com/uploads/1/3/4/3/134371627/8479443.pdfIn PDF document text
    • https://daxuregivav.weebly.com/uploads/1/3/4/4/134431970/692d287.pdfIn PDF document text
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/vobobisasojiki-suked-timenisibax.pdfIn PDF document text
    • https://fawibilewitowo.weebly.com/uploads/1/3/4/5/134585577/752f5ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475217/normal_5fb2d42919721.pdfIn PDF document text
    • https://sexutenevasasi.weebly.com/uploads/1/3/4/3/134306733/buwumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5e1eb7-092a-467d-80ab-5028a1794049/82070661295.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/56989959581.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/disable_datepicker_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/66668432704.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/mogezobapukepanak.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/yardi_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/76040012140.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_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 5048 bytes
SHA-256: 022898ef242fbcb7324ce7d8ae127b35122cb23fabf66becedd19c1e2aed0451
font_01_sfnt_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 10132 bytes
SHA-256: 33904eb79b99d0cc7f2f0a9f2f4961b45c93fbd1d9920b763a2d716762a7e189

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