Malicious PDF — malware analysis report

Static analysis result for SHA-256 03eca1850be5cb61…

MALICIOUS

PDF

67.6 KB Created: 2021-01-11 13:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ca6c518d4811a788c23e5b072ad71a40 SHA-1: 713537b481fbaa88040aa798a83911f535dfdda4 SHA-256: 03eca1850be5cb614b7415013ab54810c1c2df883bd7fd4b6b1436fd12730b9e
212 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to suspicious or known malicious domains, disguised as interview questions. The heuristic firings indicate the PDF is a redirector and part of a link farm, designed to lead users to malicious infrastructure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8050

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://cctraff.ru/aws?utm_term=manual+tester+interview+questions+and+answers In PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/8265295.pdfIn PDF document text
    • https://site-1175480.mozfiles.com/files/1175480/95353285884.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/K9Jhjjc/biberipuwepawitu.pdfIn PDF document text
    • https://cdn.sqhk.co/podadoxafa/egghgko/34247522951.pdfIn PDF document text
    • https://site-1175164.mozfiles.com/files/1175164/mojenimemagasudubodigipa.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/hjsRjd0/mugilonago.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/0333173f8a55.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/bupaxomu/6013_welding_rod_sizes.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/3202324523.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/vanafirevenoliludi.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/23207855345.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/71221882968.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/loxawo.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/the_whispering_skull.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 4984 bytes
SHA-256: 3df2d10aecfc75715483e0f6919b5b9837969c793b836e82303f053495312853

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