Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25e3a12320cb6f0…

MALICIOUS

PDF

77.3 KB Created: 2021-05-17 04:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e12c4271b9437f25cb2106cd3b03ecac SHA-1: 718a06137318e2996a4ebc5e0338b461945ae90d SHA-256: b25e3a12320cb6f0cf250de7eb6f0af1d4f805706a5124212784c20d59ab7cab
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary malicious URL being https://botokaw.ru/strik. This suggests the document is designed to redirect users to potentially harmful content or phishing sites. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=sunbeam+water+cooler+parts+ylr2-5-90ch3 PDF link annotation
    • https://cdn.sqhk.co/xujurovemu/HjcuIig/nightmares_from_the_deep_3_davy_jones_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/MPgjhio/zigowolasimel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_6069f04ebe481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_602e3f4933143.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456166/normal_5fc693c7711d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_601d48160faae.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/iaWieii/ruzugopixisegijuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_604a93d8c47e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_3d1a5de1e60a4971baa50d47dc3a854e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/welanisowari/childhood_bilingualism.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/gateway_b1_workbook_answers_revision.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/wudexumibixuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/sebusipobejidojijinepi.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/83154541943.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/nakizax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329c8ad4-be4d-47f0-915d-eace0c8e0e7f/sloan_flushmate_501b_recall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe2d658-ffd8-46a5-9b92-316b59fd3be0/461968321.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/crochet_patterns_for_baby_blankets_granny_squares.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/16535175713.pdfIn PDF document text
    • https://aaca6425-83b8-4992-a49d-2ec8a2d61848.filesusr.com/ugd/304e3c_be4e1af8fc3b4278adb42a2bcd5ce8d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90239ac9-4c0e-4ea1-acca-6fb48da350cc/fopegebabenunusalanaxefu.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_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 6360 bytes
SHA-256: 4edcd5557df0ea29e63a97abfe9363069d8b91bab3c1351a787fdfcae02e438c
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 10868 bytes
SHA-256: 4bfc7d69385c8b2f381f7458d6fde3e10692e3514ad9b34469b567ef8f9ad26e

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