Malicious PDF — malware analysis report

Static analysis result for SHA-256 718f8849c957702e…

MALICIOUS

PDF

183.7 KB Created: 2021-02-26 08:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b6f0022e2a4d34e9fc4cb6141ba83990 SHA-1: 44cbe119175937e56964c6668cce7d6c29b051ea SHA-256: 718f8849c957702e62b4657630a694059ba8f550f08719ad966533647510e3e0
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, including one pointing to 'airbin.top', which is flagged as a link farm on disposable hosting. The PDF's structure and embedded links suggest it is designed to redirect users to malicious sites, likely for the purpose of downloading additional malware or phishing for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://maypoin.ru/123?utm_term=ruin+and+rising+book+summary PDF link annotation
    • http://airbin.top/volerupeq5abb.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/9d8ab6a1324f1f0.pdfIn PDF document text
    • http://nutejujaxi.66ghz.com/brave_frontier_osiris_guide.pdfIn PDF document text
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/zerabix.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/dd_crit_fail_table.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/how_to_read_korean_easily.pdfIn PDF document text
    • http://leftoutclub.com/vojurexe3qwkf.pdfIn PDF document text
    • http://podarokinsta.online/lagu_binks_sake_one_piecenti7j.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/forutamurasawulu.pdfIn PDF document text
    • http://teaitalis.space/bcbs_blue_medicare_prior_authorization_forms6pjzy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vowaderisosalel.epizy.com/dibivesigibebelapafogoda.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/html_css_js_learn.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/troy_bilt_5550_generator_electric_start.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/how_to_clean_harman_accentra_pellet_stove.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29904 5424 bytes
SHA-256: 765e619440c606e969be94338032212dac5afdb25cc329852bdc16ef00e01cec
font_01_sfnt_off0002ab6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB6C 10932 bytes
SHA-256: 77910c2a9fd38b5cef03c79bf73243220cb9e9234d36a11d275d7ff371126c32

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