Malicious PDF — malware analysis report

Static analysis result for SHA-256 512390a3838e029b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-22 03:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e0465ad0219de0c0eff3d88c4fb6b685 SHA-1: 209856bcfff3f1b8b33f054afb7cf70d28764740 SHA-256: 512390a3838e029bdfc026c50661ef5b54dffdd0077b81b8cd86b51c4f00a241
126 Risk Score

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 0.9996

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://xezojetit.ru/strik?utm_term=how+to+date+furniture+an+easy+reference+guide PDF link annotation
    • http://lofarado.iblogger.org/child_nutrition_labels_for_chicken_nuggets.pdfIn PDF document text
    • http://presalon.xyz/107993710699lt19.pdfIn PDF document text
    • http://onlinekartiadesi.com/116677994137f2l2.pdfIn PDF document text
    • http://wupozigujoruzar.22web.org/sony_a230_untuk_video.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/jivofirezukevewe.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/heineken_malaysia_annual_report.pdfIn PDF document text
    • http://xexajume.iblogger.org/16191582347.pdfIn PDF document text
    • http://rimonevo.iblogger.org/malin_landslide_information.pdfIn PDF document text
    • http://50offstore.info/das_boot_full_movie_english_subtitlexjssh.pdfIn PDF document text
    • http://sellforce.ru/township_game_tips_and_tricksqy70o.pdfIn PDF document text
    • http://duplicwcnj.space/10763098024gck7z.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://kavezusi.onlinewebshop.net/94367693493.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/subject_verb_agreement_worksheets_with_answers_7th_grade.pdfIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_e348680f41cf40f380187ccbfddb75ed.pdf?index=trueIn PDF document text
    • http://bexipazo.rf.gd/android_10_release_date_samsung_philippines.pdfIn PDF document text
    • https://14579757-8399-40ae-9aa0-1c510f02119b.filesusr.com/ugd/5613ee_cb7512cbc0aa4ca7a092b4e3ebf01740.pdf?index=trueIn PDF document text
    • http://rufejawat.epizy.com/fitch_report_saudi_arabia.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_3428e365f1bb49d3b8a114280c90d04f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupojakami/zagat_guide_seattle.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/math_finding_percentages_worksheets.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_6970141f0e124d8d8e692327852b3694.pdf?index=trueIn 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_off0000ef0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0C 5196 bytes
SHA-256: 8afa9825faac4b0a9a63e4cc4d10287808cabef81ba58d7241d11038f895ef73
font_01_sfnt_off000100de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 11208 bytes
SHA-256: c29ff3dbd4e0935a53401a9b35a9478630373006d67a3636583d8c81f16fb73f
font_02_sfnt_off00012706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12706 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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