Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ff37f50b2ab464…

MALICIOUS

PDF

89.1 KB Created: 2021-03-18 16:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fc608ddb089e58e62b6f85755d62242f SHA-1: 08acee0d5d374ef6392eb46006724d09f3e6661a SHA-256: 54ff37f50b2ab464c0340c4a5a5e6fd7ec4be381f6825b123561fa5c503bc805
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains heuristics indicating it is a credential phishing lure, specifically impersonating Gmail. It utilizes a link farm with numerous external PDF links, including one pointing to 'vepodiruwa.weebly.com', which is also flagged as a redirector for the phishing action. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/laboful.pdf.
  • 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://kuzutuzo.ru/wix?keyword=general+lamarque+les+miserables+2012 PDF link annotation
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/laboful.pdfIn PDF document text
    • https://borusolu.weebly.com/uploads/1/3/4/3/134327960/9209576.pdfIn PDF document text
    • https://puwedogomep.weebly.com/uploads/1/3/1/3/131382223/gaxisepejo-jupufugilux.pdfIn PDF document text
    • https://zitakafe.weebly.com/uploads/1/3/4/5/134587302/1790362.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/female_pelvic_bone_anatomy.pdfIn PDF document text
    • https://tixatodaja.weebly.com/uploads/1/3/4/5/134507568/rometibog_zovavorenegu_darijosorafomar_ditoj.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/wedoxivalamafele.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/rovuweraja/beretta_cheetah_380_manual.pdfIn PDF document text
    • http://fadudenomo.onlinewebshop.net/foxusukiru.pdfIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_0106ced677bf45b49d0d4daeca175e50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rejiner/rotegulabiralesukamado.pdfIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_fdc71fb814784080855278979aa9b8a8.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_447b83875236493cb0b218eefac71f17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/nutrition_care_specialist_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/fitbit_versa_lite_have_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/project_management_report_template.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/rorokovajapabufimejinevig.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/aashto_t180_free.pdfIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_bb92d0d576804f3abf83468c0e032dff.pdf?index=trueIn PDF document text
    • http://zivonupawidam.atwebpages.com/data_structure_and_algorithm_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/present_simple_vs_present_continuous_exercises_elementary_level.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_9f3186d5254e4ef1b62ff614c22c820c.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_2172fb80e27b4e329877c686079fe315.pdf?index=trueIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_e5f59fe56da64597859569a64ff7364e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/arcane_quest_legends_stats_guide.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_389703f6803f4f3580c0b32b204ecb16.pdf?index=trueIn 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_off00011a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A83 5456 bytes
SHA-256: 8b4968a72161080084c8b8fdbc74fb0dada6cd12e98db1e69552b662761771b5
font_01_sfnt_off00012cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFD 12492 bytes
SHA-256: a91d87917ac6858ebb9fa11ecfb6b839e20b12c7a9217802ec3b6e8e609a4f0b

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