Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0007c0e140cc35e…

MALICIOUS

PDF

77.0 KB Created: 2021-05-20 09:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8c29be2b34ed5a6e9cb7d6b2673b8916 SHA-1: 2028e646628dd38e5e9b45482e498051e68e3068 SHA-256: e0007c0e140cc35ed5190b6ea5a29f0bb4bc0a074cbc4d92ca2499b09013ac88
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=usb+2.0+driver+for+windows+7+64+bit+dell PDF link annotation
    • https://tigixunejalimiw.weebly.com/uploads/1/3/5/3/135315438/rilaw_vakadavosinu.pdfIn PDF document text
    • https://fajupumivut.weebly.com/uploads/1/3/4/1/134108914/vijumuvuzo.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/tikav-jabidelisepiw-rodepowase-tusunakuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5fdf80ac3edd7.pdfIn PDF document text
    • https://nulesurusisozi.weebly.com/uploads/1/3/4/7/134744420/f32cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_6056de26124c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5fe0abdbc655c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc7339e8bfec.pdfIn PDF document text
    • https://zujododa.weebly.com/uploads/1/3/4/6/134652654/rulodudixofog_kozalij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_60252cd301865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_6037fe1cbf267.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/b997697a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412380/normal_60001bd324821.pdfIn PDF document text
    • https://gojijaxokan.weebly.com/uploads/1/3/0/7/130739343/ea5645848cce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_606989ea967d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/38928380042.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/spanish_verb_present_tense_conjugation_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/when_did_haiti_get_its_independence.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/making_butter_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/game_bloody_roar_2_psx_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/avatar_3d_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/mofikenekurap.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_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 5604 bytes
SHA-256: db473660d5cd49cd0baaeac473d58c4e0ed46469acfa9b1159470c567f3f737b
font_01_sfnt_off0001031c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 10492 bytes
SHA-256: c07c08e71b0721d4d0b2ad4d37f993f80715ad82bab438be15d971512ebd4a43

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