Malicious PDF — malware analysis report

Static analysis result for SHA-256 193d84d9df4f317d…

MALICIOUS

PDF

43.5 KB Created: 2020-10-07 04:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5f604156f0416eb0b28a100d1e28b7f9 SHA-1: fbbf4b6e1261474c9f1786b2042679217a02179d SHA-256: 193d84d9df4f317d6e248cbaf0fbf43a2527c625901ab4dff95b8bcfad54efef
132 Risk Score

Malware Insights

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

This PDF file contains embedded URLs that redirect to known malicious infrastructure, specifically a link farm on disposable hosting. The document body, though heavily obfuscated, contains keywords related to 'Chase bank tax refund direct deposit 2020' and includes URLs that are likely part of a phishing or scam campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=chase+bank+tax+refund+direct+deposit+2020 In PDF document text
    • http://files.elizabethadabale.com/uploads/1/3/1/4/131437689/57613a8de.pdfIn PDF document text
    • http://files.theutsflowerbarn.com/uploads/1/3/0/7/130776131/modazi.pdfIn PDF document text
    • http://files.myerstownboyscouts.com/uploads/1/3/1/4/131437402/ed72f24b336d6.pdfIn PDF document text
    • http://files.sinestesiacorp.com/uploads/1/3/0/7/130775840/abced5fc861055.pdfIn PDF document text
    • http://vomapaxa.roxannesmith.ca/uploads/1/3/2/7/132740214/mujefedeko.pdfIn PDF document text
    • http://guxaxeb.maestrodonappert.com/uploads/1/3/2/3/132303354/kajakozokezan.pdfIn PDF document text
    • http://files.edwardsextraordinarydachshunds.com/uploads/1/3/2/3/132303035/7447760.pdfIn PDF document text
    • http://deteninip.drylandag.org/uploads/1/3/2/6/132696067/fdba5b643ff.pdfIn PDF document text
    • http://files.jackandjillcharlottechapter.com/uploads/1/3/0/7/130775176/zozodopimej.pdfIn PDF document text
    • https://site-1044184.mozfiles.com/files/1044184/fapilezemema.pdfIn PDF document text
    • https://site-1039490.mozfiles.com/files/1039490/54814807641.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/suxitoropewumiputepo.pdfIn PDF document text
    • https://site-1043705.mozfiles.com/files/1043705/rafagaze.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/37634145309.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/60156586225.pdfIn PDF document text
    • https://site-1043328.mozfiles.com/files/1043328/serelepirog.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_off00006874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 5664 bytes
SHA-256: adc8d953a0455cc2ec70e231d1de31bf6cb96696b0253deb07b5c9d7d348dc98
font_01_sfnt_off00007ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA7 10828 bytes
SHA-256: 98b5f2eb959d313acd7ec5e3844c8caca5285364432ca31ad7d539cb11efc4ad

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