Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f04bab4e815126…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 17:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 67d23ff2e3eac4e82c4c27f1aeec636b SHA-1: 1a0b08b29280a9c8604bc47f8f581640ad51804f SHA-256: 24f04bab4e815126baa9d92c0168db36439cfd460bb8c0e495f921c1d59cfcc8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting, indicating a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wb?keyword=black%20and%20decker%20battery%20operated%20circular%20saw PDF link annotation
    • http://xuwuvewisin.mypressonline.com/gadim.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/disegilozobelovozogi.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/data_science_bootcamp_dc.pdfIn PDF document text
    • http://cetly.xyz/chalay_thay_saath_movie9qa6y.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/mubowa.pdfIn PDF document text
    • http://rastet-malysh.ru/wagodari8n7y2.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/petugogosidanusurojupeziz.pdfIn PDF document text
    • http://zzzmmmmejjj.space/87475466798mdvo8.pdfIn PDF document text
    • http://maslovauto.ru/nofemikukolonenuvasezahpo3g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noworevapetero.epizy.com/lds_come_follow_me_2_nephi_26-30.pdfIn PDF document text
    • http://simalivalobo.rf.gd/sevidatufofepasapopimi.pdfIn PDF document text
    • http://peronilekovo.rf.gd/beery_vmi_sample_report.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/38049675800.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/annie_john_book.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/how_to_setup_a_xfinity_remote_to_the_cable_box.pdfIn PDF document text
    • http://melewurimepuja.rf.gd/nitanurotoma.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_off0000dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 5512 bytes
SHA-256: c1df748150096c795be814272b5d62c8c059615a2a42f21ea356186f310a23cf
font_01_sfnt_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 11140 bytes
SHA-256: 91b71765551b0fd8063802f0b4017904f567b7419e8c0290f4f39178604923ad

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