Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cbe9676683072d…

MALICIOUS

PDF

69.1 KB Created: 2021-03-24 20:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9317c1332b0a5f28187afa339e51b4ed SHA-1: 8f845db99ad5c4222359f82508fef9536ae8e0a7 SHA-256: 62cbe9676683072d3dd102dc998d9ff9d81f7f4910834ebfb4765224dec0dcc3
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/award?keyword=jurnal+medan+magnet+pdf PDF link annotation
    • http://shopmzm.site/42420895009zcf94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367290/normal_5fe45ddd73451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fdc2f4dbb66e.pdfIn PDF document text
    • http://sirunome.mypressonline.com/xupavorulomuwinepeke.pdfIn PDF document text
    • http://yarrebitteh.online/verizon_ellipsis_7_tablet_battery_lifewb11z.pdfIn PDF document text
    • http://netewe8.xyz/mupiferaliketmf3e.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/how_to_find_initial_y_velocity.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/redegelesibif/90800918156.pdfIn PDF document text
    • http://noroved.myartsonline.com/call_of_duty_update_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/ft-950_cat_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/55562229320.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/89776148604.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/derusunosoxebirulipalu.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/luraselidabowutume.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/ruxeme.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/thermostat_heater_control_circuit_open_chevy_sonic.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_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 5172 bytes
SHA-256: ce5f7a08f669589234799e6ce1cbaf75a2039f5235ad3da57a8ab3be1e5772fd
font_01_sfnt_off0000e389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 10656 bytes
SHA-256: b9c3518b72be435d12a56272585bb4bc0f50d03e9b8a0518e99d9e22c752db2f

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