Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88b39c48a693b83…

MALICIOUS

PDF

84.1 KB Created: 2021-05-05 21:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc64ccd61f7ce202a58fd89b1979b56c SHA-1: d6fd1ca03cfbefe8b7a4a4c9182942f3a4d2ae4d SHA-256: a88b39c48a693b83d7e768bffc4f6b83805baee80cda5d5dd53809fb9210badc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=how+to+use+focusrite+2i4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472216/normal_606144b4b6b6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490754/normal_5fc5fb6091717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_601b6fee7bce6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_606e9e7ad4cb5.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/jgjghj1/rununibawo.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/ichcBja/nike_sports_bra_sale_small.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/8a06b13a-c012-41e5-a220-ca4c6c2719e5/dd_4e_best_feats.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/81235604562.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/88281485407.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_99581eae00f24bed8b9031f7973aa276.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_ff67ae70eb1f41eda273c5b5162c5dc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/nuzepuwofetomomeminiburu.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_84b8fd75fc4643f6859eaf17849d99a3.pdf?index=trueIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_191368e0d5d44476ba671025638829eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafirawit/seririkezizitojibew.pdfIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_9d115737192c47d782a19be3141c0868.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c92c05-52ab-475c-a88e-be950d2fed52/el_pollo_loco_menu_keto.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_9fc68df1ad494bec943e0b5d38f2d59a.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_fd964543d73c4f0e8c52442116ef7cda.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 4904 bytes
SHA-256: a2159f55d56353ece3406b8d718f18eaceed97bb7d1b4962238038f16f176cfa
font_01_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 11692 bytes
SHA-256: 5a2e898566a50ca3bd858a4b0c053733fd55a5fa2732f0d56032f64e230345c2
font_02_sfnt_off00012e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0A 16224 bytes
SHA-256: 31923511d5052688459cf76d63ae1389751ae0bf3eaa8ab81928471617324bbd

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