Malicious PDF — malware analysis report

Static analysis result for SHA-256 7042df6b2f47caf8…

MALICIOUS

PDF

71.2 KB Created: 2021-01-11 21:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 177808ab5f533b4a00a67bc2fca5a050 SHA-1: c1700c5ba47238953fc86f44776d6e7f94483534 SHA-256: 7042df6b2f47caf84c2ef0380479b6a0d370659aeffe103bd3637ed4baa69b24
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external resources. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one of these links leads to known malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://gettraff.ru/123?utm_term=geometry+angles+worksheet+pdf In PDF document text
    • https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/rejivalel_tamabirajomi_vajejizulitika_sifiwus.pdfIn PDF document text
    • https://site-1168429.mozfiles.com/files/1168429/5766776722.pdfIn PDF document text
    • https://goraworozegisu.weebly.com/uploads/1/3/4/3/134324811/49bf71dd5ad481.pdfIn PDF document text
    • https://tevuluzusat.weebly.com/uploads/1/3/5/3/135397550/vibuna.pdfIn PDF document text
    • https://site-1177754.mozfiles.com/files/1177754/11327414075.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/yhgAifd/mesitukusurizajidufuweza.pdfIn PDF document text
    • https://site-1174578.mozfiles.com/files/1174578/ximadux.pdfIn PDF document text
    • https://site-1175847.mozfiles.com/files/1175847/first_aid_beauty_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/btgejhQ/cat_runny_nose_drooling.pdfIn PDF document text
    • https://site-1176407.mozfiles.com/files/1176407/batumosowebexaxo.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/somamere/patusubozibodijedage.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/android_manifest_network-_security-_config.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/7146445762.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/jekimixewelureluxas.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_off0000d8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CE 5744 bytes
SHA-256: 052d6ccde34163ad47cca80bb8f5f3284ed55a4f912ffc19116bdf645da83232
font_01_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 10552 bytes
SHA-256: aec55aa05ce8f4f032865a56fbf159dbee2c4aa6eaf8b2e204a3ef096131ff56

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