Malicious PDF — malware analysis report

Static analysis result for SHA-256 59094b3783b8d220…

MALICIOUS

PDF

87.1 KB Created: 2021-03-14 14:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f32bd5592344e5222cfecccd613d6bea SHA-1: 260b46f159ddf64e7bc93e6c9bfaf2b6044a282a SHA-256: 59094b3783b8d22015bd8e1ca4a4319c56524cd877c48ecd136240b8b87657ef
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one example pointing to a trainer file for a game, suggesting a deceptive lure. The primary malicious URL identified is dugedepap.ru, which is likely part of a link farm or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://dugedepap.ru/wix?keyword=ap+chemistry+thermodynamics+free+response+answers PDF link annotation
    • http://bofinaposo.iblogger.org/26116418965.pdfIn PDF document text
    • https://sudiseva.weebly.com/uploads/1/3/4/4/134470115/89127086dfb48.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/golunutilelan.pdfIn PDF document text
    • https://mudatikijamowa.weebly.com/uploads/1/3/1/4/131408537/pavatokozag.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/zusasekagebolikeso.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/65769000525.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/6a79e3b4-dfed-4e16-a4ac-0b4f734e446c/company_of_heroes_2_complete_collection_trainer.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_9bd970c5f8454becb1848659010fc37a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/eu_de_augusto_dos_anjos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acac8a48-a945-4881-98ef-ffe9a7990ecc/7126816235.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_8ecd86df229c4571a1b230d75a529086.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/assam_judicial_service_exam_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/information_about_fatima_ali_jinnah_in_urdu.pdfIn PDF document text
    • http://jezowadu.epizy.com/look_out_verb_forms.pdfIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_6c2e0eae54174061b6c411ccbe519bb9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ae35c9-bad1-49e5-b280-4fa35aa50146/40872319014.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_8e4316c8d5384c84b0aac7b934144e1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5269b81f-522e-49f9-8462-8cf9b8b112a4/jololow.pdfIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_1a8acf8d41f441038a43bb513d5ef7fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/back_bench_student_film_songs.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_d61e545611df44efaaf61c3f0f3b76d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/church_banner_design_templates.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 5332 bytes
SHA-256: b23862f5217b0ae7f16afc2766fa3b5b65b317f00f5d5035dbfda5c5092abdc5
font_01_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 12336 bytes
SHA-256: 8b2f203d1dd99361e31e51774e9dc51c42a610afd5e5556012d6b5ed31a9fb6e
font_02_sfnt_off00012ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD6 16136 bytes
SHA-256: 8d0ca5441952925faa6f68d28470995fcd5e3edd800b1977fac83179433ae1db
font_03_sfnt_off00013fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176