Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c5dcaffdae42ab…

MALICIOUS

PDF

66.3 KB Created: 2020-12-23 06:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c0f528a0e04d40e0df7c6045bcdc8e97 SHA-1: 7ef6c72f7a58feb47286065df88b9b0f8c8c90cb SHA-256: 04c5dcaffdae42ab6f5912ebd2939b5b395cc749edd2857fed6b05af4402283d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to a book title, suggesting a lure to disguise the malicious links. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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
  • 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.
  • 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://ggtraff.ru/123?utm_term=bates%2527+guide+to+physical+examination+and+history+taking+11th+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f9cae8ac9397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5fbd674d8e85a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5fdf9178d0585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_5f975e6b17eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f9a945641859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403681/normal_5fc93c8fe738b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5f9a7fab074e9.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/kebokutuvejib-poboparutu-vetesusutas.pdfIn PDF document text
    • https://kelodulelonax.weebly.com/uploads/1/3/4/6/134644310/eb1b240839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470967/normal_5fde909717563.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/xunilukegez/fanabigisipugipi.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/image_slider_html_css_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/53090332593.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/the_grand_tree_osrs_guide.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_off0000c407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC407 5940 bytes
SHA-256: 4a38f0aef15619939dbc5413e20a6c1f2a61bc933d413ee2d04d1b6da036b561
font_01_sfnt_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 10460 bytes
SHA-256: 624b6c7de0aba501adf6a55ce9b7ba7c3b9cf7973b9a17bc7a13e1b465e7877a

Open this report in the interactive analyzer, or submit your own file for analysis.