Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b0c1ffb497590b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 21:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5609ce254a0637969ac95efb0b5e9b82 SHA-1: df2540484d6f0fdc712707da6ae64ff0be9a1d5d SHA-256: 76b0c1ffb497590beaf75a4c4c5c025b3261682634a3399601fad3de7d98b2b7
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://lozipotod.ru/strik?utm_term=how+to+track+international+registered+mail+usps PDF link annotation
    • http://pay-order.info/xusavalirawipinolazx54l.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/hcohcif/belifapawulud.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/kiwiwuno.pdfIn PDF document text
    • http://extraterrestrials.space/79390197328pvfzd.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/doguzirowozuvif.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/visa_on_arrival_application_form_thailand.pdfIn PDF document text
    • http://bioforcecolumbia.site/vizio_38_2.0_sound_bar_manual3orej.pdfIn PDF document text
    • http://kudretbozaci.com/65734227353oe6ne.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/what_is_the_paperclip_test_for_power_supply.pdfIn PDF document text
    • http://bitjoms.xyz/63191077267m8n90.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/26914115611.pdfIn PDF document text
    • http://carishr.com/99567948498zblc9.pdfIn PDF document text
    • https://cdn.sqhk.co/dagorabowixu/0jhgchj/17799690573.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://tivakifuzir.atwebpages.com/zuvolalegel.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/gisogojapusoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff08182-de58-47a5-86f1-3f225b72bfb6/thoth_tarot_card_meanings_chariot.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/oracle_database_11g_sql_commands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b55af8-1cfe-418e-bc8f-b13d8dcf04ca/xasapopejosabavat.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_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 5392 bytes
SHA-256: 7f4b89aed5f9b28da6e15eb9b255eb82f70060c1314b73d8bb50ce3a2dcf72a5
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10904 bytes
SHA-256: ea77e89dd5c2fac38120c3096b1ce1ed5704fd9846464627815a7f40110a75be
font_02_sfnt_off00011968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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