Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55fc44420954056…

MALICIOUS

PDF

96.6 KB Created: 2021-03-01 19:26:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2567468b7fe9c6acee5a6a6ea7c03f4c SHA-1: 65a4fa0448d079653029ae88f565ba18c3aeb543 SHA-256: e55fc444209540565cc7446e46729a19ad9b254a87952cb0c2cc6c5301e702ab
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the 'link farm' heuristic point towards an attack pattern focused on directing users to potentially harmful external content.

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://leonvi.ru/123?utm_term=la+republica+platon PDF link annotation
    • http://fofolep.mywebcommunity.org/65730047431.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/hhbDshf/bejevusupekisokozowodot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_60118f7ce6c14.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/cl1hhRQ/terra_mystica_factions_strategy.pdfIn PDF document text
    • https://motixovelubebov.weebly.com/uploads/1/3/6/0/136085904/3950810.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/renoxelewotewobiwetovod.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/blank_world_map_with_borders.pdfIn PDF document text
    • https://bofazereb.weebly.com/uploads/1/3/4/6/134675062/3423945.pdfIn PDF document text
    • https://gotukedefiwukub.weebly.com/uploads/1/3/5/3/135309477/8ee33.pdfIn PDF document text
    • https://cdn.sqhk.co/gofuzurafano/jfgdGjb/100gb_free_cloud_storage_degoo_apk_download.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://gixarewujedel.atwebpages.com/pusinulenoxifidugizaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/dynasty_warriors_unleashed_beginners_guide.pdfIn PDF document text
    • http://fuvozakini.epizy.com/audacity_download_mac_10.7_5.pdfIn PDF document text
    • http://govujetimavex.epizy.com/32619336577.pdfIn PDF document text
    • http://temekem.epizy.com/98410049172.pdfIn PDF document text
    • http://gafodix.myartsonline.com/how_to_give_a_compelling_interview_presentation.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001159b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159B 4712 bytes
SHA-256: 89b585eddb6195b72f100926b31855af99c29ac4c6e11e4ce8c09ffcc21d4db3
font_01_sfnt_off000125a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A1 13564 bytes
SHA-256: 49b24eec9335bf122c95fc5af14a7ddb7e8c9a9c93a5448dd8931a7624434b9e
font_02_sfnt_off000150f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F6 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8
font_03_sfnt_off00016541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16541 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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