Malicious PDF — malware analysis report

Static analysis result for SHA-256 10cbbf889afcff50…

MALICIOUS

PDF

42.0 KB Created: 2020-10-02 00:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 970d794c8ddfd29c957ef2c273290eae SHA-1: b77e06de7d35986b773be86e4a5146b7dc1188f4 SHA-256: 10cbbf889afcff506129f654572c26aaaff68d29f1e58e03dfeeadcfe4564683
154 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 suspicious domains and appear to be part of a link farm. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL leads to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/strik?keyword=gli+indifferenti+moravia+analisi In PDF document text
    • http://files.nwexplosion.org/uploads/1/3/1/0/131070294/sinumud-vaximax-dimomatifokewu-fesafaf.pdfIn PDF document text
    • http://fuwenatoz.lesa-grc.org/uploads/1/3/1/3/131381658/bowex.pdfIn PDF document text
    • http://sejok.nilesvp.com/uploads/1/3/1/4/131406806/visulajigogiwe-gupuzegoluval-zulekeropubitew-rapejixofanef.pdfIn PDF document text
    • http://zufasit.alternativegolf.co.uk/uploads/1/3/0/7/130740000/zidoseg-baragorelirajid-budalibur-luvepuzutu.pdfIn PDF document text
    • http://pufapepi.care.coach/uploads/1/3/1/6/131607254/41eb24.pdfIn PDF document text
    • http://kaniwisu.2ra.co/uploads/1/3/0/7/130776201/9973490.pdfIn PDF document text
    • https://site-1039430.mozfiles.com/files/1039430/90239781108.pdfIn PDF document text
    • https://site-1038520.mozfiles.com/files/1038520/bevivajixizowaduzupod.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/17975584676.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7005/8407/files/meberesevadina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5325/1491/files/julawiwodaxeriwume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/longleaf_school_of_the_arts_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/65512115921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0269/4296/files/71340096685.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_off00006659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 5144 bytes
SHA-256: 5f99fa0a1305dedf8dd773455d2f810001ded88e65814cd486ed7e5c814e2f5f
font_01_sfnt_off000077ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 10792 bytes
SHA-256: bd14afbd7129dbadc0fecbe98b1dc6b2ff3df9185dec1087a9ed2cc679eb9d25

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