Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e679c98d6f28994…

MALICIOUS

PDF

75.6 KB Created: 2021-05-19 08:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2edffa6f56082a1ed371476a49ff85c4 SHA-1: 40bc3ac7fa0a79b8160477365a9c7b47f5126e9d SHA-256: 3e679c98d6f289948c292545952118541d80a56bcb43ca0b91dcd4c13ed78186
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, 'https://jottigo.ru/strik?utm_term=geometry+dash+world+hack+apk+2019', is likely used to distribute a malicious payload or redirect to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=geometry+dash+world+hack+apk+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445326/normal_6060840a4f6e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_602c74366445a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_6066f75f8d842.pdfIn PDF document text
    • https://debexubomes.weebly.com/uploads/1/3/4/8/134881130/5831072.pdfIn PDF document text
    • https://kezopepeza.weebly.com/uploads/1/3/4/3/134332650/nizoxodotuzoxi-xemoge-retifuvigi-jepebejixaxamun.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/fd914fe6-e90d-4585-91c1-93bbf444bc13/97029101793.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/87112774045.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/94254066782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e87496c-578f-4135-be4c-4442834f76d0/why_is_my_electric_furnace_not_kicking_on.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/microcrystalline_cellulose_usp_monograph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e6f27a-b3c7-4e5a-8b25-e0ceab15865e/30588628081.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/zolaxisilitir.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/coilcraft_0603cs_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/69497149249.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/how_to_reset_waste_ink_pad_counter_for_epson_l380.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/how_accurate_is_the_wonder_weeks_timing.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/51641619584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d48d792-fdfb-49b2-8f96-108c4cf614ac/89112993795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a566dc3-82a8-495a-805b-b97df11c8225/jonedomu.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_off0000e775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 6084 bytes
SHA-256: 0340e31582962c3b9bc5baee8f207898d40affa16772d764c1a16f609f5bf30d
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 11144 bytes
SHA-256: 1067af029789aca62cd9b5fce93582e241ba041898127bf80363e98381386d9f

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