Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46ace66015d9c11…

MALICIOUS

PDF

82.7 KB Created: 2021-02-18 01:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9df5c9ac9b191872b949f6de4a3ab27a SHA-1: 207a61ac977a10c1b8ce316c0cd64dbb32747273 SHA-256: a46ace66015d9c1134306c7c0f9bed3f78706e7cc4b029bff908703adda29bc5
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain text related to Linux certification, likely a lure to encourage clicks on the malicious links.

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://yafferge.ru/strik?utm_term=how+to+study+for+linux%252B+certification In PDF document text
    • https://cdn.sqhk.co/vovewotutal/ihhghh5/hot_wheels_drift_king_24_seven.pdfIn PDF document text
    • http://naturmilans.fun/binkw32._dll_windows_8m15gf.pdfIn PDF document text
    • http://flowerport.shop/pokemon_revolution_online_mt_silverf0u5y.pdfIn PDF document text
    • http://eurostore.info/gabelli_gold_fund_fact_sheetjjsnl.pdfIn PDF document text
    • http://rukofuvifoti.22web.org/80148023481.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/TiijbOI/rimofiwigudiratofiz.pdfIn PDF document text
    • http://familyit.info/hlookup_example_in_excelhnm8l.pdfIn PDF document text
    • http://wavosebiza.22web.org/adani_power_limited_annual_report_2018.pdfIn PDF document text
    • http://options.expert/63658410797j7kq9.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuduwedimu/vigljcr/bucket_list_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/9a7sge3/expanse_cast_season_1_episode_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/81416092239.pdfIn PDF document text
    • http://xefavab.rf.gd/kingdoms_two_crowns_guide.pdfIn PDF document text
    • http://xuwixevuje.rf.gd/battle_royale_movie_in_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/rojovisila.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/patekadekajug.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_off0001053b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 5240 bytes
SHA-256: 8afb63d329069a9e7d8920bb719103c1e610f5576ee0fb40479942e9794c4da9
font_01_sfnt_off00011736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11736 11172 bytes
SHA-256: f3da5a872052ef7c68742a07a282b3d6f24646a37ed074cd8dae21b0de2d00e6

Open this report in the interactive analyzer, or submit your own file for analysis.