Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0a7741d5e094bb…

MALICIOUS

PDF

70.2 KB Created: 2020-12-08 15:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e17abe4c33e3a926f2ae993be00fbf11 SHA-1: 3ffc8273ebcb9007e2c65687fa8ac9f9f61563f9 SHA-256: bc0a7741d5e094bb2d0ff53cc387d75c66b15a4cd855d2784582f5911e935b91
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links pointing to various domains, many of which are hosted on disposable or unknown reputation platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=all+in+learning+logo PDF link annotation
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/sorixonodawakurobo.pdfIn PDF document text
    • https://satatemusuk.weebly.com/uploads/1/3/4/3/134311800/gowija.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/accff23c8d8826.pdfIn PDF document text
    • https://fuxugunepegox.weebly.com/uploads/1/3/4/7/134761488/damevisejuxu_sipobegu_mimozudofa_xitotu.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://pebetojakudasud.weebly.com/uploads/1/3/4/8/134879391/5975646.pdfIn PDF document text
    • https://vuriluwaloseg.weebly.com/uploads/1/3/4/4/134492921/fafelazedotod_zujofawafe_fibofazozuj_buziwima.pdfIn PDF document text
    • https://deledixedebudon.weebly.com/uploads/1/3/4/4/134499708/zugum_vuvilodun.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://s3.amazonaws.com/zidenigad/56088191451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3485c5c7-685a-4c69-85f0-b2152f03608f/luropefuko.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/31526728850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8443c56c-f7f5-4f1e-99a2-5a30c61eaa00/59761040611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de261e02-e5d4-4365-bfaf-7e4000548f6a/mazelodavibidanom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3ec321-2f51-4411-bce4-60b6cde84769/86308477166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba5ff05-0be4-482e-9aa5-282beed24029/the_amazing_spider_man_mod_apk_data_highly_compressed.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_off0000ca68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA68 4372 bytes
SHA-256: 001a02e00330f500eac39bf99d57aa01c9fc1fa02b79bfe6e6abdec06bf4106b
font_01_sfnt_off0000d932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD932 11008 bytes
SHA-256: 8aeb36a3013bd3ce0edfec733933b80b387ff756ee0e286ce69fbe2b6792d9c6
font_02_sfnt_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.