Malicious PDF — malware analysis report

Static analysis result for SHA-256 d297a620815ae9f1…

MALICIOUS

PDF

78.6 KB Created: 2021-05-20 13:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 700c0e6b6d4a76b163d9e23f7d007417 SHA-1: 2840068a9402e0a55407270b61d39686f1f5fdd1 SHA-256: d297a620815ae9f1571efb8378c9245b052f4b41db8c267e1ff169834d668653
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure for software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Android kitkat 4.4 2 software download' and 'wkhtmltopdf', suggesting a deceptive download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=android+kitkat+4.4+2+software+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368265/normal_6042511f281ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_601aeb2835bc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495034/normal_606561bed34fa.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/ed78ad79-4446-44e4-ab8c-cc49106db3f2/nagupopapazipu.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/94185879254.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/88228859873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6151c2d3-1354-4691-9cc8-b1b5e365addc/k30_vs_k50_pentax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6faf02-a34b-4cc0-88d6-7a0a345f67b2/12416689135.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/marantec_m4500e_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e341655-1f42-4392-97c7-d9b6b75b12d8/associative_property_of_addition_worksheets_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e5ea40-2e75-4c47-ab14-ae34e9459164/79196622450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a367325a-6897-4c02-8b36-5faddc530321/42520618470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c38961-71d8-4d17-a6f2-8a8a1adf34be/15843804130.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/69165274064.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/beautiful_angel_images.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/ego_lawn_mower_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/wobelosavuxuzotetejede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a007b232-77a0-4503-8b9f-660e32287ce3/windows_10_iso_free_download_full_version_with_crack_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/8254820620.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_off0000f7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D1 5296 bytes
SHA-256: eecb2e52ca990788c115eafc3a25b9927b6e674b884d78d35e8664943091a932
font_01_sfnt_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 10264 bytes
SHA-256: 054a81b1dcaf72b1f466fc44e5eb2367de1c88a6db43d10bb1a2b33b5913009f

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