Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea6b59540335738…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 08:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57770b7148509711c06ba6e62d8a3ff6 SHA-1: 81c1c7fe8fd4637d542b4ff220da9f245ea2366d SHA-256: 2ea6b5954033573894a0295fb9fcad7dfbb0fa22d44db70261d4b32c01692045
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting, likely for phishing or malware distribution. The 'SE_INVOICE_LURE' heuristic suggests a pretext of payment or terms and conditions to entice users. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://seumenha.ru/wix?keyword=online+purchase+terms+and+conditions+template
    • http://dadevizevarek.scienceontheweb.net/midudiboxerizewovapabowej.pdf
    • https://cdn-cms.f-static.net/uploads/4446035/normal_60253d87df563.pdf
    • https://cdn-cms.f-static.net/uploads/4447916/normal_60590d5067da0.pdf
    • https://cdn.sqhk.co/fupokiwil/gfs7Mjg/infectious_mononucleosis_rash_images.pdf
    • https://cdn.sqhk.co/naxudufejik/bFsDsjc/14539556452.pdf
    • http://xagugudel.sportsontheweb.net/42892610909.pdf
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5ff6834b2de30.pdf
    • http://zasazigupat.getenjoyment.net/84365224012.pdf
    • https://cdn-cms.f-static.net/uploads/4467300/normal_604715b008c98.pdf
    • http://finuxezanasa.mygamesonline.org/2396321585.pdf
    • http://vutisonoj.sportsontheweb.net/ashrae_170.pdf
    • https://static.s123-cdn-static.com/uploads/4384037/normal_5fe0aa8565198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gajutar.onlinewebshop.net/a_breath_of_snow_and_ashes_book_for_sale.pdf
    • http://fuguzametekobo.myartsonline.com/ca_dmv_form_dl_44.pdf
    • http://rorazizaxaf.atwebpages.com/the_devotion_of_suspect_x_movie_trailer.pdf
    • http://moxapowi.myartsonline.com/64267385774.pdf
    • http://suxudogakol.myartsonline.com/zejivorigefolagamo.pdf
    • https://s3.amazonaws.com/gazijewevan/mount_athos_information.pdf
    • https://s3.amazonaws.com/kexamoxusinixu/17076311883.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d3.bin
99e2c3a0ef764b911603f6f0bec8b78702f1e6110d1fbdfe93716470cf5a65bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 5340 bytes
font_01_sfnt_off0000fac9.bin
55253933041e541b30a006eb0d955cc8e9ad814af8b7f87e58dbd1ff5f2f4d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC9 10264 bytes

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