Malicious PDF — malware analysis report

Static analysis result for SHA-256 560925483a0c0506…

MALICIOUS

PDF

69.4 KB Created: 2021-02-14 04:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: da1211fd4a13c5d48f5ebc7be9fc0948 SHA-1: 9ed03d62034ca971e62a9331f909e8cac5dc1f80 SHA-256: 560925483a0c05063afe25cd6a0d1b25d953e6bc32604c58312d1648e20bea12
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/123?utm_term=are+mushrooms+decomposers+or+producers PDF link annotation
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/zeloperolepobomobal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458849/normal_5ff1feb907dbc.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/jiiekie/wanidub.pdfIn PDF document text
    • http://pavajevubuj.iblogger.org/vidmate_new_version_android_app.pdfIn PDF document text
    • http://blognews.top/national_defence_academy_coursesibj69.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/ihciihg/97601969537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_601005ab1dc7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_6023f0972d835.pdfIn PDF document text
    • http://awpmode.com/gegidatumukakibogavugilu3s2tq.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/pwjijje/fuvaletabi.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/9Hicoje/german_movie_nowhere_in_africa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_600c8dc0affa3.pdfIn PDF document text
    • http://snapchat-alert.com/2268177946ps2sv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421623/normal_5fedcddf7d2ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460688/normal_5fc7cfc60a59d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_5fe81d34af2fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasaxotudulolo.epizy.com/kakashi_wallpaper_4k_android.pdfIn PDF document text
    • http://movuveso.rf.gd/86742793331.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_off0000d478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 5060 bytes
SHA-256: bb511866ac5ac1e9dee39925cc2fb797a8a8949029a1419fa75ed890fd78906b
font_01_sfnt_off0000e584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE584 10272 bytes
SHA-256: bd6aeec881c1ecf897b14ddaa79cdfa402a233644f8d4e7ee0e4652e6bec22f9