Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e9269864c2fd13…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 15:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a89399a838fa96b800cbb025f0752cbc SHA-1: 1b444c68d46030270e0c6e8924af55978902a6d4 SHA-256: e2e9269864c2fd1327d046d1377d88e65027cb96d544f82a11e9e84b20665656
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, with a high heuristic score indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'video player for android', suggesting a lure to download potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=video+player+for+android+2.+3 PDF link annotation
    • https://cdn.sqhk.co/zudilubal/gggg1hh/9200684668.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/0iagfjg/23174775401.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/company_director_resignation_letter_template_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/wafudovop/f2jhBjb/mamujev.pdfIn PDF document text
    • http://vutomifewomisub.iblogger.org/how_to_analyze_data_in_excel_spreadsheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widofafane/jojuxaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0167c2-f299-4706-bbe7-dc791f6acc3e/what_kind_of_charging_cord_for_kindle.pdfIn PDF document text
    • http://fakuzilezozo.epizy.com/calls_blacklist_call_blocker.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/microsoft_windows_server_2016_standard_licensing_guide.pdfIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_721482c6d5f7483dbbf030ac6e9496f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65afec41-09b2-403f-b051-ffbb3836702a/boganedifafenutukezovizog.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/ludinugorudamapewe.pdfIn PDF document text
    • http://dapulejotavizej.epizy.com/disadvantages_of_bottle_feeding.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_161aee1402d74c5f92cb42e2000cb16d.pdf?index=trueIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_1a4e114519944f83be847e984ec4647c.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_6e825699f7824cd7a439bdbc7af6f7df.pdf?index=trueIn PDF document text
    • http://mukuraxoviniron.rf.gd/tuwaridof.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/fininuwefivazetabenujor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/493cc9fa-b582-402a-9c3b-681a8df8aab7/99301156494.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 5252 bytes
SHA-256: e0682ab9370b2a88e091a759bcf412322465209512748c90b529afff17e47c15
font_01_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 10084 bytes
SHA-256: 9e07ea3f2198cc00e1e36847048d4a2e7f6ff89a79ee7a8d440149c7c9426e00

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