Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb926bd982d2cd73…

MALICIOUS

PDF

71.8 KB Created: 2021-04-01 19:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c2c6f098c8a143d5fa1ae6f5307c1cb0 SHA-1: 1b500af5573029ead4edb3e36aa40f8d12cca295 SHA-256: bb926bd982d2cd7379dee4ee6cf635693a0ab1b659321f9f6267a00ec22eb888
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 0.9995

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://xajibur.ru/123?utm_term=waterproof+disposable+draw+sheets PDF link annotation
    • http://atomlinux.com/heathkit_tc3_manual64hvw.pdfIn PDF document text
    • http://figojusu.iblogger.org/converter_mp4_to_avi_apk.pdfIn PDF document text
    • http://xixijebufo.iblogger.org/pipibamobesap.pdfIn PDF document text
    • http://obuv-kozha.ru/cinebench_r20_windows_76cteq.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/ski_safari_adventure_time_apk_data227kv.pdfIn PDF document text
    • http://fajutixosisi.22web.org/astm_a105_a105m.pdfIn PDF document text
    • http://vurupilinimini.iblogger.org/camera_scanner_to_kndigen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakokaxawizepu.epizy.com/consumer_finance_account_on_your_credit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e8ce84-3917-4afc-8b57-c46c11582cbd/77104457759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e3a1f6-662c-442d-bfb9-068fb47e5910/the_art_of_racing_in_the_rain_streaming_english.pdfIn PDF document text
    • http://fenigubigona.epizy.com/96008453830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd381070-2369-4289-9b64-96e268817a52/fodmap_foods_to_avoid_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82507359-6006-4d2a-af25-c0cbc5269c33/annovi_reverberi_pump_unloader_valve_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9db1b0-9443-477e-a33e-b21a3c3f3c00/how_to_get_a_nurse_residency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75bb8ac2-6dd5-4f0b-9e09-6af4ea724abe/nugitugiw.pdfIn PDF document text
    • http://mowozikip.rf.gd/novojefukipaxunexuwizez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ab0cd9-dfe2-45d6-a015-da2ade9c4278/what_are_normal_echocardiogram_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b115f506-4432-4440-ad58-ce583ad4eacf/fagewad.pdfIn PDF document text
    • http://jibovofafef.epizy.com/53116783729.pdfIn PDF document text
    • http://robefopatobut.epizy.com/greatsword_mhw_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89cde50f-4113-4339-918d-495df8f1b5c9/v_shred_weight_loss_program.pdfIn PDF document text
    • http://pejibuturu.epizy.com/vevasuwanes.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_off0000d84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84B 5376 bytes
SHA-256: 3ff63b14640f08a087e8912e3093126aa2711a628abbcaee9b1975b3b3b50ac1
font_01_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 11516 bytes
SHA-256: d12883e156f40431ef1abf175f17957e61552f6ebb97c72cdc4eeb0d96533406

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