Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde703d6fe7e5fa2…

MALICIOUS

PDF

77.9 KB Created: 2021-04-02 16:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 96c089e06d15f4d35f1d5bbc8a2e7e72 SHA-1: 45f7b73bdceaef4e149560785942c196d3308aa3 SHA-256: fde703d6fe7e5fa29a36e89b411c1646c08a86d0fe19ac85ed9cb4f8db7f3064
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://baarspo.ru/wix?keyword=osrs+level+3+skiller+quests PDF link annotation
    • http://elinekici.online/gatetiezmc9.pdfIn PDF document text
    • http://my-favshope.online/tupperware_microwave_rice_cooker_instructionsie06s.pdfIn PDF document text
    • http://masajsalonunuz.com/liberty_bell_march_piano_sheet_musicialg5.pdfIn PDF document text
    • http://spencermcman.us/wezugotesalum74sw.pdfIn PDF document text
    • http://khareedforosh.com/196518913061uglt.pdfIn PDF document text
    • http://good-production17.site/74770371630yo4nm.pdfIn PDF document text
    • http://erogan24.website/bash_shell_scripting_trainingue7ct.pdfIn PDF document text
    • http://parralax.net/43972935135585zj.pdfIn PDF document text
    • http://regsenatvumen.website/2164079543qechz.pdfIn PDF document text
    • http://50offshop.info/what_does_chinese_snake_mean7632z.pdfIn PDF document text
    • http://runmasten.online/what_are_the_best_times_to_eat_for_weight_gaind1lqz.pdfIn PDF document text
    • http://copyright-help-report.com/njdep_primary_and_secondary_drinking_water_standards4749w.pdfIn PDF document text
    • http://polikarmonolit.ru/97188326877c2rck.pdfIn PDF document text
    • http://straponartist.com/project_gantt_chart_free_templateldzqw.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://7lessons.fun/team_shooting_drills_for_basketballsd16s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8450d2-042d-4688-a251-aa7bab04e591/51124861865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24af554d-4129-44a3-9de5-cd629a31e981/funoduxedatiwotuler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453045cd-0420-4d69-b68d-5ee3c0f65b66/minn_kota_i_pilot_link_vs_i_pilot.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_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 4908 bytes
SHA-256: 253302266b9de4bec71405704d957b656efbdb69c3fdda074f9b88ad0c1a39af
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10956 bytes
SHA-256: 7cf6d629f1d33633dc65318ce8992fabaab9dc0d85ebc9cdf40a8879325ede67

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