Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1bbfe970ffafca3…

MALICIOUS

PDF

81.6 KB Created: 2021-04-20 10:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f21e424cc948173acbf0aedcc05e0229 SHA-1: 5476c09cd9e4a4406983b0e41d989b1571dd2848 SHA-256: f1bbfe970ffafca3f822032cfa25cd4830d6b2280089a938e74041b3c8d1b9c9
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 0.9996

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://xezojetit.ru/strik?utm_term=analisis+de+la+tregua+de+mario+benedetti+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408346/normal_5fcca72b06ce8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368506/normal_6008e4965eec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_600dcff262c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_605380c64850d.pdfIn PDF document text
    • http://wimosam.22web.org/16808388939.pdfIn PDF document text
    • http://getveran.site/adobe_illustrator_trial_for_windows_10pnjhx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_5fe69a45c1289.pdfIn PDF document text
    • http://55571.ru/kizujiribetegojtle9u.pdfIn PDF document text
    • http://usene.xyz/their_eyes_were_watching_god_pageseysi3.pdfIn PDF document text
    • http://wonder-ita.space/778104900955ajdx.pdfIn PDF document text
    • http://pusokum.66ghz.com/commandos_2_game_pc.pdfIn PDF document text
    • http://pujugekan.iblogger.org/best_alternative_to_google_chrome_android.pdfIn PDF document text
    • http://fartook.online/android_arduino_wifi_control_devices_with_esp8266_moduleagndy.pdfIn PDF document text
    • http://magazinrf.xyz/lagarizafegujp6e99.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/wifiduxezo/masked_singer_white_tiger_performances.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ecf757-0b54-4eb7-9e69-5f114200a753/how_to_use_my_max_buzz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd842c7-d9f0-4f79-922a-91505abc2e8c/vegavikazebebarolepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c92761e-2505-4582-9b1e-b46bb2bce429/dyson_v6_animal_cordless_vacuum_spares.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/how_to_reset_maintenance_light_on_2015_prius_v.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/vokomere.pdfIn PDF document text
    • http://mexaguroduwora.epizy.com/allen_carrs_easyway_to_stop_smoking_audiobook.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_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 5492 bytes
SHA-256: 507fe3d15d1c3e36d0e1a7754e563219d87c779143a37811856bfec6c433e4f8
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 11520 bytes
SHA-256: 2d4feea062c05585903e8f1619abef36cbf8d229970d85627e6863a7dd0a295d

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