Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ade361f8eccbd5f…

MALICIOUS

PDF

77.6 KB Created: 2021-03-18 11:34:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e63dc143445961bcff9cbb236fde761a SHA-1: dbd73a402d7bba35a8f7b88300a4b497bcd463b9 SHA-256: 0ade361f8eccbd5faa9243a4502badb898dfc480fd3bdcd558487b0d2d093c67
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=juniper+srx650+configuration+guide+pdf
    • https://cdn.sqhk.co/jukunobegabe/iefNeGI/nasa_federal_credit_union_ira_cd_rates.pdf
    • http://vokemukise.iblogger.org/57293181715.pdf
    • https://cdn.sqhk.co/tuzevawu/jgjg7ic/gopolufikujuwogaz.pdf
    • https://cdn.sqhk.co/gujuvizaja/ks0OhUt/65375889594.pdf
    • https://cdn-cms.f-static.net/uploads/4383804/normal_6044fcc97dae5.pdf
    • https://cdn.sqhk.co/ponesigis/hgvhbQg/60_s_rock_and_roll_music_youtube.pdf
    • https://cdn.sqhk.co/vigeroti/cJwqPhi/cowboy_hat_emoji_copy_and_paste.pdf
    • https://cdn-cms.f-static.net/uploads/4476272/normal_600f9f5225b2e.pdf
    • https://cdn-cms.f-static.net/uploads/4479675/normal_6018bd58c495a.pdf
    • https://static.s123-cdn-static.com/uploads/4416665/normal_5fed905f5cac9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cef5750f-9023-4f4c-869f-505155910896/dubiwuwusokojek.pdf
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_b4b1fa406fec4945b476bbf2a66aa9c1.pdf?index=true
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_9230158cf9c3467c97990c4a43b078b0.pdf?index=true
    • http://sufalilisep.rf.gd/lodalerarowevidinewasoj.pdf
    • https://uploads.strikinglycdn.com/files/b2ef2a9f-d88c-4d3d-995f-9d02a95784fd/sawanilebufan.pdf
    • http://mivolipo.epizy.com/dry_reforming_of_methane_fluidized_bed.pdf
    • https://uploads.strikinglycdn.com/files/7802b3d0-16ec-4b80-9fd9-4107413c6a39/jajekimuz.pdf
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_7594014369ab4ffb8b6728117d8bd16c.pdf?index=true
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_8737e9941ce5428f9b32a07ac0f3a029.pdf?index=true
    • http://sonisan.epizy.com/purer.pdf
    • http://porapasegunan.epizy.com/87311184540.pdf
    • https://uploads.strikinglycdn.com/files/dea6d1f4-9ed1-433c-a75e-1c884744289c/what_is_the_prefix_in_the_word_biology.pdf
    • https://uploads.strikinglycdn.com/files/adf79b19-63de-46a2-b445-34b2103a94c8/jofazurofupo.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_off0000edbc.bin
3f693a832b4438f78c81869fa039df95f0d61e04850fda3da80cdbf1457f195b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 5768 bytes
font_01_sfnt_off00010180.bin
eb2f1a847d3b6bd5c95c20041f4b7d612a4353f7d874c592eb24a63b271d537c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 11204 bytes

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