Malicious PDF — malware analysis report

Static analysis result for SHA-256 067c4cef7c961d97…

MALICIOUS

PDF

66.1 KB Created: 2021-01-13 12:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9107e058732d343b2ccb35600bdcfd47 SHA-1: d62fd9cd85727daad874a7fbfbdfd352243ae29e SHA-256: 067c4cef7c961d97e175edba51dc495a9b60e8d6969045e006a8d456051c482e
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://gettraff.ru/123?utm_term=boston+to+costa+rica+all+inclusive', are likely used to direct users to phishing sites or download further malware. The document's structure and numerous links suggest a link farm designed to obscure the ultimate destination, a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=boston+to+costa+rica+all+inclusive In PDF document text
    • https://site-1177067.mozfiles.com/files/1177067/psd_freebies_templates.pdfIn PDF document text
    • https://site-1195801.mozfiles.com/files/1195801/pesovopowuzisa.pdfIn PDF document text
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/62f43fd53c4567.pdfIn PDF document text
    • https://site-1177829.mozfiles.com/files/1177829/harcourt_grammar_practice_book_grade_2_answers.pdfIn PDF document text
    • https://site-1224059.mozfiles.com/files/1224059/bodosevedanifasepowip.pdfIn PDF document text
    • https://site-1199436.mozfiles.com/files/1199436/85230135643.pdfIn PDF document text
    • https://site-1167973.mozfiles.com/files/1167973/7461166101.pdfIn PDF document text
    • https://site-1226457.mozfiles.com/files/1226457/72354053843.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/parakefotulis.pdfIn PDF document text
    • https://site-1191111.mozfiles.com/files/1191111/christmas_duets_movie_cast.pdfIn PDF document text
    • https://site-1174461.mozfiles.com/files/1174461/79816762676.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/vyGja8C/43692257061.pdfIn PDF document text
    • https://site-1184666.mozfiles.com/files/1184666/bee_brilliant_blast_download.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jjijjjT/girl_bands_of_the_late_90s_early_2000s.pdfIn PDF document text
    • https://site-1177754.mozfiles.com/files/1177754/diwazozawig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC680 4904 bytes
SHA-256: c67d5a22fd5efce6395e0ce768ffd377bd9fd243b2ffdc38361dbdc3399815f7
font_01_sfnt_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 10720 bytes
SHA-256: e03ba47b4f3ae4eb37b4def685f67053b5c32ce07b6cbf4bdb1653a80b71e97f

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