Malicious PDF — malware analysis report

Static analysis result for SHA-256 6975d4d6a6f4336a…

MALICIOUS

PDF

65.7 KB Created: 2021-01-23 14:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6dbdabf345931b1b09933b2295438c5f SHA-1: e5fc48f2757ca6e57515a408735f28f296498938 SHA-256: 6975d4d6a6f4336af4c038176c3ef65fc0788654f442bde5e54f370f9d7649c2
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffmen.ru/aws?utm_term=men%2527+s+saucony+everun+guide+iso In PDF document text
    • https://salewuso.weebly.com/uploads/1/3/1/3/131379029/35955ddeaf9e4f.pdfIn PDF document text
    • https://site-1245874.mozfiles.com/files/1245874/autograph_bengali_movie_song.pdfIn PDF document text
    • https://site-1246802.mozfiles.com/files/1246802/bpdb_circular_form.pdfIn PDF document text
    • https://site-1173271.mozfiles.com/files/1173271/pefibowifaxumivodamomax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_5ff1d249466e8.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/b83275f.pdfIn PDF document text
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/vosofakezezilife.pdfIn PDF document text
    • https://site-1234383.mozfiles.com/files/1234383/cosmopolitan_magazine_cover_template.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/wumodukubaru/anemia_ferropenica_en_el_adulto.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/34055680750.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/open_book_vector_icon_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/vegixobejekuw.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/2024730044.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/facebook_video_er_for_iphone_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/asus_zenfone_5_android_10_alacak_m.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_off0000c279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC279 5276 bytes
SHA-256: edb7324fba4eeb011d999eddbae4707f766b1e7ffc94ddc91f2647438be0d71e
font_01_sfnt_off0000d499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 10996 bytes
SHA-256: c4e420f540bcf9407b63cf6644ed3dbb438fcaa31aeb5414544f5c07c8adb27c

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