Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb86bc593c66ee8…

MALICIOUS

PDF

314.1 KB Created: 2021-04-19 13:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 06ae0460711c5198150179703fa31d96 SHA-1: 7ce5c2d84771d977518ae0e5bda39721e511e4aa SHA-256: efb86bc593c66ee8c3465f988b752fc6c107bbde0786287d9bfab117ccb632c7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure related to a 'Brother sewing machine e6 error message'. It embeds a URL, https://botokaw.ru/strik?utm_term=brother+sewing+machine+e6+error+message, which is highly suspicious and likely leads to a phishing or malware distribution site. ClamAV detection and ML classification confirm its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9610

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://botokaw.ru/strik?utm_term=brother+sewing+machine+e6+error+message PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459483/normal_5fce870ac55d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392451/normal_6002554b9cf3e.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/agriculture_biologique_dans_le_monde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_6047c87358833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382960/normal_5fed72d5c35de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_60298be24b39d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6037a6e893eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_5fdc4c7320f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5fda605059a46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5fd0562229787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_601708835556b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawerudarasikow.myartsonline.com/how_much_weight_loss_first_month_after_gastric_sleeve.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_869ba44d82a245c1a2b15813978f4c51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6570d65-54ea-43ab-9fca-c84a0362bb5f/69920955399.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/denote_vs_connote_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8869334-2aac-454d-9b40-3a10dafc5ab2/devobikavegufikaregibiguz.pdfIn PDF document text
    • https://4e4608fd-868e-43f5-b6ba-14e5e4b50785.filesusr.com/ugd/b1f235_31bc9e9c0ca7427d86c52913252de840.pdf?index=trueIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_cf7afe7b47a24f929adfa94a987b07ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4769245-af96-475b-8b6a-bc4c374e2eb7/jagukagojedugodunepum.pdfIn PDF document text
    • http://vorinemoxolupip.rf.gd/33020546662.pdfIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_8d4aa1607ddb491689a1589922b75af0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79329f7e-dd37-48e4-8534-561e8aee3f8e/switch_steal_unwrap.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00049e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E31 5476 bytes
SHA-256: e98b8d31bfe632094674b3d704d8fcdc7edfaf561f7166996ad022be70a6e120
font_01_sfnt_off0004b0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B0BA 11584 bytes
SHA-256: e3a08973d0f08ddfae26f9fc9fc9e34014b3dad6af9cbb64fabd474977ff75a9

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