Malicious PDF — malware analysis report

Static analysis result for SHA-256 556453655c7de501…

MALICIOUS

PDF

80.1 KB Created: 2021-03-19 07:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cb81cabcc2efc738b4dbc5654898d486 SHA-1: 7b02dca874afadca606af21fd8af2b453d98db87 SHA-256: 556453655c7de501bb3a33354f590631816043880c6d9e1a86483b8c1164a5a4
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including brand impersonation for credential phishing (Disney) and a fake invoice lure. It contains numerous external links, one of which is a redirector to a PDF hosted on weebly.com, suggesting a multi-stage attack. The ML classifier and ClamAV detection further support its malicious nature, indicating it likely serves as a dropper or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • 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://temetufel.weebly.com/uploads/1/3/1/8/131856903/755120.pdf.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://druttle.ru/wix?keyword=publix+return+policy+with+receipt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426960/normal_5fe5ec15e1cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_60128802d0f1c.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/aJKypc5/remix_to_ignition_original_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5feb09744fe74.pdfIn PDF document text
    • https://temetufel.weebly.com/uploads/1/3/1/8/131856903/755120.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/jcCgiid/sunexakixuxanizos.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/gjjjQSZ/vector_security_camera_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/bwgdl2d/3845411346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fd9c7b96bd01.pdfIn PDF document text
    • https://fovubimosifiwu.weebly.com/uploads/1/3/4/3/134324820/3701781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_600dbf3db828e.pdfIn PDF document text
    • https://tulopudegiwidal.weebly.com/uploads/1/3/0/7/130739196/namex_pomibonijofapam_gudabaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451744/normal_5fe6513ba7bdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28cb7cb-3a29-49a8-9caf-05ddf585d5d7/wudonibug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5257328-d6a3-4089-af0e-f9bbc13fba23/ruxupirojuvaletibobotedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6592388c-6e51-4be9-ac17-c2305892a41d/futoxobusasisifefivek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ef7aae-a029-410f-a7e7-a062c48ca87e/36989184481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20a8839-bba1-44da-9ff0-5b057475720c/romeo_and_juliet_act_1_scene_6_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25925d3d-5955-4f11-882b-30af3c78b867/clean_living_norfolk_carpet_cleaners_dereham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c21277-86db-4057-afaf-b216a48148fb/ernest_hemingway_list_of_books_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecff16b0-b91e-4aa5-a7e4-0a73bb933c76/sat_prep_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414a59c7-4bf5-4632-b137-d4e02c050a66/86643076881.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 5036 bytes
SHA-256: 69081a9d3e03423e86c8bb8337d61b55b86c1e0de445f40d6d295c8015411cee
font_01_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 11252 bytes
SHA-256: 269d8ceb4f0c4fe02a5249e02aa8d13a755b08e90ddbcbc4402119b0920f0b76