Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb01b41aba9c84c9…

MALICIOUS

PDF

133.3 KB Created: 2021-03-14 17:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ea8f4f236bab8b65bb23a0afc345d503 SHA-1: 2dab53f6aa9b87d46fceea79ad8ed0acf03641a0 SHA-256: fb01b41aba9c84c98d40315cd08a9de00d829143d0f453668c1083c685fa4026
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=garmin+gtn+650+tso+installation+manual PDF link annotation
    • https://cdn.sqhk.co/nobutowug/ajaibyG/45276221081.pdfIn PDF document text
    • https://cdn.sqhk.co/pewowutefiw/dE9fibt/download_game_trap_adventure_1.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/68050354859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5fd60f991a425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fccb507079a8.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/j1jaNUF/69894490447.pdfIn PDF document text
    • http://tizezs.xyz/44058736872m7adp.pdfIn PDF document text
    • http://goldstein.berlin/61260005526d0116.pdfIn PDF document text
    • http://rating-bookmaker.ru/79209315976k5ghu.pdfIn PDF document text
    • http://antileqphh.site/iwoot_size_guideezwo5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_60397dabe36e8.pdfIn PDF document text
    • http://gazozasi.scienceontheweb.net/4762624183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_60304d0aeddf0.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/lasko_ceramic_tower_heater_vs_motion_heat_plus.pdfIn PDF document text
    • http://wimesuzajomos.mypressonline.com/dojalulapetizopogetedinom.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_7d6bf4ca6df4482a9707258675a2a027.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_2fa0c266ed6b498e9dfe7d9b6485f95e.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_d7324a8a57da45659a964a54aad350d0.pdf?index=trueIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_1e0d70165219407895f5d590c4af4ed2.pdf?index=trueIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_42edc26daac64b57b72cbe6a3de5fb40.pdf?index=trueIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_a4d7930cd9e641ea9cd7f85351743025.pdf?index=trueIn 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_off0001bdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDB1 2164 bytes
SHA-256: be2dc518f16f73d9b953854d0cd9e859fb05ded6838733c50aab3ba6fb15ab17
font_01_sfnt_off0001c7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7AD 5456 bytes
SHA-256: 2dfc509572a0fbc9028ab8836efe224b89c12157c731167bec59d99b95eacd08
font_02_sfnt_off0001da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA23 12788 bytes
SHA-256: 471ad38c76277307a146b66bc14e06645413bc0121c9438676729f659d63f549

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