Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0a2cb60276683e…

MALICIOUS

PDF

79.1 KB Created: 2021-03-12 16:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f7d3faf7cdefdd0132643b43590f927 SHA-1: 2074deec688909a5bd5dc3cf37d18c1dd1652fb4 SHA-256: 8d0a2cb60276683efc3d77c673b66b7e5a1e768d8ad7d05d34d4ee887699d65a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed for SEO manipulation or phishing. The primary URL, 'https://xajibur.ru/wix?keyword=linksys+wmp54g+driver+windows+8.1+64+bit', indicates a lure related to driver downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wix?keyword=linksys+wmp54g+driver+windows+8.1+64+bit PDF link annotation
    • https://nesexabaxurozij.weebly.com/uploads/1/3/4/8/134898102/tipisuzututin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503874/normal_60480c97aa53e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_6042198f9ef09.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/how_to_clean_smith_and_wesson_22a-1.pdfIn PDF document text
    • http://gladkoe-telo.xyz/pdf_ocr_adobe_acrobat_standard_dc2a97z.pdfIn PDF document text
    • https://fomexiterejetax.weebly.com/uploads/1/3/4/4/134435806/bijuxazetubo-rubebajema-mabula.pdfIn PDF document text
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/taboraborux.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/gimamomovagipipebifo.pdfIn PDF document text
    • https://jufoxaju.weebly.com/uploads/1/3/4/4/134489692/matulomodu.pdfIn PDF document text
    • http://voicebftyi.com/athens_tech_nursing_intent_formglzss.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/9894336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_602957692480d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456667/normal_5fdfccdcf2193.pdfIn PDF document text
    • https://mojisavavuke.weebly.com/uploads/1/3/5/3/135312470/desejopimumukawa.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/christmas_carol_sheet_music_printable_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_601d71dca7a0a.pdfIn PDF document text
    • http://weridif.medianewsonline.com/como_resolver_integrales_definidas_paso_a_paso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/55651323-3ec2-4453-97a0-b4c84fb9c821/60160368823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf2812b-3d25-4946-8ebf-c32046eb0a1e/vokapuzovilepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40465f82-fb36-466c-8a07-800beedfc39d/jerozutigugasezuzadovuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8feb3421-8a44-45df-bb31-2cf5da3a1ad8/how_to_write_a_review_report_sample.pdfIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/wireless-n_wifi_repeater_mt02_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d3dc05-04b3-4be0-921a-a93215965088/9396169695.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 5868 bytes
SHA-256: 321ae9056182c668589edf7e25b2426b8200ed7ba8f8695c1d4a8b202b25c999
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 10116 bytes
SHA-256: 16939cef3dc0cebd3e235c53817b26e66345bceaa919d7ba6eb72ffaac99f886
font_02_sfnt_off0001209d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333