Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48609ff1de14e0d…

MALICIOUS

PDF

75.4 KB Created: 2021-02-14 06:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a4f677bd9be0396c24941570be69d577 SHA-1: 149bcd9b86968dc5ed334d8681a29e52dee245bc SHA-256: d48609ff1de14e0dab371ce77b2cb661e58fe8c03b8714421b668f7c1d8ff6d9
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=puedes+tener+paz+en+la+tormenta+versiculo PDF link annotation
    • https://cdn.sqhk.co/togodawexu/JJjhau6/launcher3_apk_6._0.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/7uHidpI/hicarer_clock_movement.pdfIn PDF document text
    • http://vovality.club/610840143817bhv9.pdfIn PDF document text
    • http://trokot-online.xyz/black_shuffler_gamefowl_for_salekdt30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423454/normal_5fde3b114d277.pdfIn PDF document text
    • https://cdn.sqhk.co/wotedimozer/OijLxH3/69993763785.pdfIn PDF document text
    • http://nerroba.info/zifobuvixuvaferenujoza5th4p.pdfIn PDF document text
    • http://fojudesekuxujef.22web.org/febinumajuzorowagoran.pdfIn PDF document text
    • https://cdn.sqhk.co/vusopukov/hje1mhf/samsung_email_setup_authentication_failed.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jijpjdG/9168777324.pdfIn PDF document text
    • http://dorightschool.com/205322565829ljlg.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/bJggiyF/surviving_titan_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374537/normal_600103fa59a95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tojopoxirer.rf.gd/35442573413.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/apache_index._php_file.pdfIn PDF document text
    • http://lizaduguxo.epizy.com/95091601798.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/9508246615.pdfIn PDF document text
    • http://bikikifuxax.epizy.com/ethiopian_airlines_crash_report_being_released.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_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 5212 bytes
SHA-256: ac57496ed7fe57e6fe1604cfabaf70c0fd8fb9290834406cb2d0c059a5e7185a
font_01_sfnt_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 11428 bytes
SHA-256: 577b15b56b7a228fc3177c8927180847ac2b4fb0efd1e76380514807d42a9066
font_02_sfnt_off00011215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11215 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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