Malicious PDF — malware analysis report

Static analysis result for SHA-256 5304656f5352031f…

MALICIOUS

PDF

58.4 KB Created: 2021-01-23 15:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8ee283f3320beb2579aaef98b4ff2d6d SHA-1: c9dc041763fc46529f22910218729e5ad7b014ee SHA-256: 5304656f5352031fd65925fdaa4b5c552a2aacbb953a0088b745ba941042dd5a
252 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, forming a link farm that redirects to malicious infrastructure. The primary redirector URL is https://traffine.ru/aws?utm_term=angular+6+form+validation+custom, which is flagged as malicious. The document's structure and link farm indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8132

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/aws?utm_term=angular+6+form+validation+custom In PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/duxufug.pdfIn PDF document text
    • https://site-1172267.mozfiles.com/files/1172267/pew_pew_pew_lasers_iphone.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/zuxisab.pdfIn PDF document text
    • https://zapotaputilaka.weebly.com/uploads/1/3/2/6/132683001/5679061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_6008ac7a29aa2.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/ce851b60a9f2.pdfIn PDF document text
    • https://site-1180467.mozfiles.com/files/1180467/little_heroes_books.pdfIn PDF document text
    • https://site-1174864.mozfiles.com/files/1174864/18828709963.pdfIn PDF document text
    • https://site-1247202.mozfiles.com/files/1247202/19097326968.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/kakekojezutok/other_others_another_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/pediatric_hemolytic_anemia.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/dafivak.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/firekogiwemolonaladof.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_off0000c100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC100 5544 bytes
SHA-256: 2648ab6585bcc729e97aab21b5d046570f16319fc86538ed29781ca73adfc337