Malicious PDF — malware analysis report

Static analysis result for SHA-256 c982cdb82e16eeba…

MALICIOUS

PDF

74.9 KB Created: 2021-03-14 04:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9c7268d448a3387eba16e3b5db0c31e4 SHA-1: 1a9d82955ba3f89a812794f6ef687564683164e6 SHA-256: c982cdb82e16eebad5fa2b10bdddd59662c463a1f198b9603a64254bfa11e069
156 Risk Score

Malware Insights

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

The PDF file contains multiple external links, with one prominent link leading to 'vilenefex.ru' which is associated with a game download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest an attempt to create a link farm for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://vilenefex.ru/wix?keyword=pokemon+tower+defence+download PDF link annotation
    • http://xasanefajisa.sportsontheweb.net/senulire.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/sekovami.pdfIn PDF document text
    • http://fullcreditreport.info/at_2_letter_airline_codelq3ov.pdfIn PDF document text
    • http://disclosures.space/6939808947n6pk9.pdfIn PDF document text
    • http://noksipals.online/huawei_mate_10_lite_firmware_updatedsgtr.pdfIn PDF document text
    • http://fabermanufacture.ru/steve_jobs_biography_onlinemoool.pdfIn PDF document text
    • http://wonnaturila.space/sufikisunoxizubipogiwifhgbfl.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
    • https://uploads.strikinglycdn.com/files/3c765519-a076-49b1-8b27-5b7370883399/32403434252.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/gasotefumafatix.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/86352358807.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/war_of_the_worlds_2005_alien_wiki.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_14a129221ec84f8f9473b89734788a23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizufapu/makavekigomotubu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/kometazanupurazefupan.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/cg_bhakti_song.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/viva_video_maker_for_pc_filehippo.pdfIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_0825383091974b618959a66b0365c06e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/ayyappa_patalu_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb3ac18-2625-4a79-a1ba-79ceac1d76bc/fibup.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/47717250231.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/guinea_pig_care_sheet_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f298a2-6b17-43df-ab7f-e69639c1b6e9/how_long_does_the_milwaukee_m12_last.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/kazesukipivir.pdfIn PDF document text
    • http://samdangames.blogspot.com/p/play-ptd_16.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 4888 bytes
SHA-256: eb1e3fd5b406495e0891a26b603b0998c81b5ff2e4dfc2ea7878e5663b0c69cb
font_01_sfnt_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 10240 bytes
SHA-256: 5018a60545876af0c9dc283c2bd2e47a183bc49bebf8a0d5069a51f673cb68c0
font_02_sfnt_off00010f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F97 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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