Malicious PDF — malware analysis report

Static analysis result for SHA-256 5835886ee4c91e4e…

MALICIOUS

PDF

74.1 KB Created: 2020-12-24 22:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2f8fd043a1ba1075eddd6283c6b2d111 SHA-1: b52adb68c37bd7276bebc088a1e6698137c5c77f SHA-256: 5835886ee4c91e4e357d91db1d40cc0f250e769e8b4dd7d46fbacc008646f735
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least two identified as malicious redirectors. The document body, though heavily obfuscated, suggests a lure related to 'Epf withdrawal form 31 online'. The presence of multiple external links, including a link farm, indicates an attempt to direct users to potentially harmful websites for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=epf+withdrawal+form+31+online In PDF document text
    • https://talowitutujuf.weebly.com/uploads/1/3/3/9/133999148/winazibajonusi.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/7e0d99.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/vofaramiwavuw-duzalon.pdfIn PDF document text
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/8142612.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/tivaroxopo_pigax_vilotuwun_manunodetubes.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/b37c8ba3bd2cc9.pdfIn PDF document text
    • https://wajigigo.weebly.com/uploads/1/3/4/5/134588105/3055138.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/jedaxopopuko/breast_cancer_now_financial_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/82330911019.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/handwriting_practice_worksheet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/50593149890.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/vaguzogokowunilepi.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/fuselunudadoxodasawes.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_off0000e529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE529 5368 bytes
SHA-256: c21ae9c96025c50ac7281e9f2fca24a94a0dba65821ac69678f2cd03acbd35e6
font_01_sfnt_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 10788 bytes
SHA-256: 532e1e23e421d28f82304292a3b0e78e260d13c7f7411b9cbbf3c9f206ca3e47

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