Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2ac1eee4e02f26…

MALICIOUS

PDF

79.2 KB Created: 2021-03-28 07:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e1d5e1f51fee13bdd32ab971e8f9b31e SHA-1: daabecc14203151a693a61c7b725784f770a3baa SHA-256: ea2ac1eee4e02f26e568513637db701d0edb0269c0336da2b1606fbb7e07f55d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs and a heuristic firing for a 'download button' lure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a secondary payload. The presence of many external URIs, some on disposable hosting, further supports a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=perfect+book+cecelia+ahern+pdf+download PDF link annotation
    • http://wavokumad.iblogger.org/give_a_synonym_for_guided.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/42827053159.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/19673249498.pdfIn PDF document text
    • http://kopatizukuxaluj.scienceontheweb.net/job_acceptance_letter_from_employee.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/kifarupesatanad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_55a3c57180c8494da9e5527960eedd18.pdf?index=trueIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/bsphcl_je_electrical_syllabus.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_4cfb9427286a4ec0a8b884b16ef6a338.pdf?index=trueIn PDF document text
    • http://kujafugakare.epizy.com/crow_agency_tribal_courts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8baf449b-ef44-436f-8bc9-2db0d6180d81/43182874002.pdfIn PDF document text
    • http://xewewiwuxadul.rf.gd/forme_juridique_socit_anonyme_en_anglais.pdfIn PDF document text
    • http://gekidajup.epizy.com/35349482033.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/70408957854.pdfIn PDF document text
    • https://f43304fd-85e4-489a-8612-81977e01be4a.filesusr.com/ugd/b6f504_c1ff530c7fab42a29624c59916c6ba4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d418b2-2eac-4f60-9195-0efc6511d2fe/vojodarosakiloruj.pdfIn PDF document text
    • http://tonixororonimi.rf.gd/9984715531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fed451-8024-4def-a404-48b93861ccae/17994427314.pdfIn PDF document text
    • http://ziboporo.epizy.com/9962666345.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_69fc1a21dbcc45b789c450730a81f677.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 5360 bytes
SHA-256: 6d909396d6cad278d3bf2c33fb99b42a70824bf1ae404a0295d54c496d889bd1
font_01_sfnt_off0000f467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF467 10844 bytes
SHA-256: 93c08da4cc63039e0cbfe5f6dd2f36821e16d917a81b7cf0c11170b2efb7ace3
font_02_sfnt_off000119ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EE 16248 bytes
SHA-256: c89cd4610e7ad6cabf04f9876a36b22b5c31ae53dba02aeaa1b4677657537330

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