Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6750e59267cbc1…

MALICIOUS

PDF

76.9 KB Created: 2021-02-24 20:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9f2263473264922275e75620033cda86 SHA-1: 18295c78cb81ef7407b3f147f36fd1fe9a4c7688 SHA-256: fa6750e59267cbc1f8a221bfa8354ba15653bbb00530ce52007e6f6f31816142
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded URL is designed to trick users into clicking by referencing pre-employment tests. While no scripts were directly extracted, the PDF structure and malicious link indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=how+do+i+prepare+for+a+pre+employment+test In PDF document text
    • https://cdn.sqhk.co/gofelaxes/xiigeia/bidev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_60177b1e4e852.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5ff639b942443.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/1hhhc74/9062175056.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/information_technology_degree_online_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/gWQtgcn/truck_driving_games_free_download_for_windows_7.pdfIn PDF document text
    • http://kelnoteres.xyz/zelda_nds_rom_download8v7s2.pdfIn PDF document text
    • http://numulul.mygamesonline.org/wukakekemuxabomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450244/normal_5ff9340ab56bc.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/zepifudoxapo/wotimevos.pdfIn PDF document text
    • http://duvodix.myartsonline.com/lobifojijo.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/23302748980.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/72736359299.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/new_moon_rituals.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/abc_songs_video.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/how_to_hook_xfinity_cable_box_to_tv.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_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 5344 bytes
SHA-256: 650de5cba43a6e3e4a59f2eabca950fc2037ba012a938100326c956a42293092
font_01_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 10672 bytes
SHA-256: ebde3e21a7d973137ddb51345e46effc43c7444c6ede217efee1def506b1afb0

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