Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b84bb4ff18b122…

MALICIOUS

PDF

75.5 KB Created: 2021-05-31 23:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9c2510d6da991cfa81a295a2e434b951 SHA-1: 5d7d61abe4dd0e1edcf4427eaafaadaa1c48538b SHA-256: 49b84bb4ff18b122287f0a36a8f22defcea34a8230ff4fa5ca00d9d861cc86d9
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 0.9997

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://allytemp.ru/pbw?utm_term=how+to+add+friends+on+switch+minecraft PDF link annotation
    • https://mewodufupojapoz.weebly.com/uploads/1/3/1/8/131857890/53e5f78.pdfIn PDF document text
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/9573920.pdfIn PDF document text
    • https://xavixevoke.weebly.com/uploads/1/3/4/5/134590279/9685a5e2d6e237a.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/e9ad604.pdfIn PDF document text
    • https://goxejebifebiv.weebly.com/uploads/1/3/2/6/132682819/07a88884.pdfIn PDF document text
    • https://sabigakubotel.weebly.com/uploads/1/3/2/7/132740275/monodeki_miturot_zerozijasemap_tafawale.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/jedatejofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://garigor.pbworks.com/f/kingroot_2020_android_9_pc.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426105/allied_universal_ehub_training.pdfIn PDF document text
    • http://garigor.pbworks.com/f/14402404478.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/true_skate_all_maps_apk_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ecbef6-fb80-4d67-b61f-fb6a1f71d0ab/is_avengers_series_over.pdfIn PDF document text
    • http://garigor.pbworks.com/w/file/fetch/144425202/gbc_4250_laminator_parts.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/f/how_to_activate_g-shift_g502.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144423807/25493864332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f80a4b-11b1-4518-b35f-7ccc6bd8b0eb/phantom_of_the_opera_broadway_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3f039b-56ae-4474-941a-261f7890b205/how_to_use_serato_dj_lite_with_controller.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/f/26071074048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119db1f5-9344-414c-acaf-007689658cfc/89471995583.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144416112/kipewaxi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 5068 bytes
SHA-256: 58a37cb8e8a001a4506b1501bee94ce502869be825aaf0bf069d07c805c4c396
font_01_sfnt_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 10820 bytes
SHA-256: 792da4a26b126ed8ad0aea0b9670f146cbb9c3e9515c92506312cea114627673
font_02_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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