Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae31de765af97f3…

MALICIOUS

PDF

81.5 KB Created: 2021-02-24 00:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 11b27c1529b28e49a80ebc06cce03235 SHA-1: 8988081494ec7854394c43cd2fb652173d71d791 SHA-256: 0ae31de765af97f3dbf0153a5e7fafc1bf8128f6a351770465dbbfd28f1bdae4
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a redirector to known malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a search query, suggesting a phishing or scam lure.

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
  • 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://crophysi.ru/strik?utm_term=what+is+on+taco+bell%2527s+menu In PDF document text
    • http://lady-bug.club/jisabivunibegapolesiboxf34e9.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/idvmKWc/99475822411.pdfIn PDF document text
    • http://sosed.market/zafojonavibsjux1.pdfIn PDF document text
    • http://drive4mclaneaustell.com/68787700443v7thb.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/hayfifh/minesweeper_unblocked_hacked.pdfIn PDF document text
    • http://nukels.xyz/answerable_synonyms_and_antonymspyw4o.pdfIn PDF document text
    • http://detonic-ufficiale.website/fozizunemenozjgysk.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/jdja2s6/download_fruit_nibblers_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/yHdFjeL/hulu_neon_logo.pdfIn PDF document text
    • http://instapresent.site/ronosogexekitoxomufop6v65j.pdfIn PDF document text
    • http://timecodes.net/when_worlds_collide_seriesxwyrp.pdfIn PDF document text
    • http://xbet1.fun/best_reader_for_ipadgnnfq.pdfIn PDF document text
    • http://dostafood.xyz/waze_app_funny_voicesvx04r.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/eSih286/78883844835.pdfIn PDF document text
    • http://centerverifybadge.com/vanawijoweznwtu.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/lif8jgj/48830830828.pdfIn PDF document text
    • http://ridunculus.com/415514062272irvo.pdfIn PDF document text
    • http://womans30planet.com/mudunubekodekopuxovavi9yvk.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/miledu/winatuditixufame.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/inverse_of_3x3_matrices_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/rulinorubaxezemonev.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_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 5132 bytes
SHA-256: 128e3c9a57ed13bb140718e36cb8d431f300ac597b8c101a75d9ef2130320a11
font_01_sfnt_off00011294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11294 11092 bytes
SHA-256: e61e8a8667a6a195891f7a953cfc86dbd9c35594e0446b71b096556a3ba22d82

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