Malicious PDF — malware analysis report

Static analysis result for SHA-256 7297c5b7067458b8…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 17:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8dd7446490759d104ce8a70ca6db8562 SHA-1: 50ea723b85d13bcbc15a11697dd292f7a6cef2aa SHA-256: 7297c5b7067458b88694dc8b999832adb6b73d4eb48bf898b3e4c01a450825d0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=geometry+quadrilateral+test+review+answer+key PDF link annotation
    • http://lisolu.org/23955679056ewzom.pdfIn PDF document text
    • https://cdn.sqhk.co/mafokesaxuvi/VQspsw0/best_free_video_conference_call_software.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5ff46926410dc.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/jhidjfl/hearts_on_fire_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/chahai1/cardinal_quest_2_spyglass.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/QJigRSu/83910909555.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/xjcjBid/muripufogaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovafom/fwhajJw/printable_blood_pressure_by_age_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/hfHgia6/99208460932.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/g1pjiw6/60220388442.pdfIn PDF document text
    • http://podeves.xyz/cd_press_manuale_digitale_clasa_5r5e4k.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/jdQAjie/hungry_fisherman_restaurant_florida.pdfIn PDF document text
    • https://zeloruzo.weebly.com/uploads/1/3/5/3/135349371/bujobijidupisupol.pdfIn PDF document text
    • http://sale50.pro/samsung_galaxy_s9_vs_s20_screen_sizey6chu.pdfIn PDF document text
    • https://cdn.sqhk.co/nerurepaza/igjjcjc/82237067774.pdfIn PDF document text
    • http://bravos-kids.ru/234276632347shfn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_601618ce60f73.pdfIn PDF document text
    • https://rawutakoze.weebly.com/uploads/1/3/4/3/134326806/bf7947a4b8.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/0313b473-77f1-4b0f-b809-5d8aeabee46a/terewexarefajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343a772a-51d7-46f1-b445-4edb98d44817/49547108975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc82bce1-a25b-4a49-8fc9-994f7fa4cbd3/carel_easy_compact_controller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeaa2e9e-82b9-43b0-816f-46229d42778a/hp_probook_4530s_bluetooth_driver_for_windows_10.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_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 5444 bytes
SHA-256: 65b1ee15953ce755bcdfe7d9d69f1463325f22b26a345425ee4959245a29ac7f
font_01_sfnt_off00010af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 11752 bytes
SHA-256: 5ca66fd6212c3437726f0b0d667796271076b4f8960d0e192cc0e14398a5a037

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