Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bc3006515eabcb…

MALICIOUS

PDF

92.9 KB Created: 2021-03-30 02:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1a2e444c920936bbfa20b38482a35ea1 SHA-1: 1c36cc982efa5e598a05beebb113ad1bf9d2e617 SHA-256: e3bc3006515eabcb93e77d01f4a697d0bb397f023e57b7276a7cfc3d20fe2ba3
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru', suggesting a lure to a malicious website. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm hosted on disposable domains, further supporting a malicious intent to redirect users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://maypoin.ru/award?keyword=classes+of+levers+worksheet+pdf PDF link annotation
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/xadurog-kavanufevav-sopitofureg-xelagesejepip.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/pW3igoM/wovavutexogijigudililij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fcdd762aba1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5fdb24c9dae45.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/3YljcKy/98247949377.pdfIn PDF document text
    • https://tezimapegimera.weebly.com/uploads/1/3/0/9/130968984/xagetun_mewiri_tikoxatodifi.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/bebowoxajow_penemofas_livodupiloxebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5ff570d3e7ce3.pdfIn PDF document text
    • https://cdn.sqhk.co/tigadikem/ifgigij/34880757660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_601be30652933.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/4901876.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
    • http://fezogax.rf.gd/40668255113.pdfIn PDF document text
    • http://tefabonapo.rf.gd/blank_lesson_plan_template_esl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3958a9-636b-4e27-b7d8-17c114673fb6/gekuzolinote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbb2dc6-4b46-4404-bd1d-0222afa752c6/kenmore_humidifier_filters_15508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0506ebdb-7ccc-44c1-8c24-ace44d198c7d/software_solution_architecture_document_template.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 6920 bytes
SHA-256: 295db31d1a262d57d0040ed2f59410bd95c8b34bdc426679e32c490fa3206853
font_01_sfnt_off00010b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 5000 bytes
SHA-256: 82d194ad802c35f4ad5cb436aeb0624969d11ecb00cb1aff100a294748760027
font_02_sfnt_off00011cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB2 11084 bytes
SHA-256: 92e7bc079ea85bbb74b4ba177ac0b63ff77c0e30a006b0134be4f8c95c879ea3
font_03_sfnt_off000142d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D5 16136 bytes
SHA-256: 271a2e063496e2c4cca37b0de2c67913adc99ef93bccf7d4450a7a441f6150a4
font_04_sfnt_off000157cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157CB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3