Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e0b852e3ce8104…

MALICIOUS

PDF

73.6 KB Created: 2021-02-27 19:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a4766c87fbf792853d1d0fd1a859641a SHA-1: 9be4a1717c1d604402d63c6fdc4f21aaf3e97cbd SHA-256: 86e0b852e3ce8104b0fc8276844eedb9e237141c7feae3ba3507d9c40588d2dc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful 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
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=magic+the+gathering+modern+horizons+booster+box PDF link annotation
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/tober.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/xotijufuvagusifijetujofa.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/13642655946.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/the_koran_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/how_to_get_phthalo_green.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/apache_maven_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/alan_gratz_prisoner_b-_3087.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/zolabu.pdfIn PDF document text
    • http://nixewawomito.epizy.com/4711126987.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/fojabuzamabijodedumipekug.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/godetob.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/indian_punjabi_bhangra_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/gossip_girl_season_2_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC969 7100 bytes
SHA-256: 12ac4a5499e7f4c97cd7175ef1f9daf6c2cee40e320fd3acc8088df598965f81
font_01_sfnt_off0000e140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 5584 bytes
SHA-256: 7fb24e958550c687124dcccf38f5d03e64fe06cb8c351819a777db1a48bb0d65
font_02_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 10072 bytes
SHA-256: 267121130efa1dfa527b733e4c57b80e41f2e959ddc10609f937f75aff239a82

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