Malicious PDF — malware analysis report

Static analysis result for SHA-256 f198c6e2595667f2…

MALICIOUS

PDF

74.7 KB Created: 2021-03-18 20:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cde24cf76ddbff0161c693cf524db249 SHA-1: 9e5c964a22e532c89a736ba0dc8ac3bfddb36749 SHA-256: f198c6e2595667f2ebccdd612cae7982e164897ce975ab51ee8928e1f382234f
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or deliver further malware. The document body is heavily obfuscated and appears to be a lure, possibly related to search terms like 'a wind in the door pdf online'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dafemum.ru/wix?keyword=a+wind+in+the+door+pdf+online In PDF document text
    • http://spindlndou.space/854822042136ek6u.pdfIn PDF document text
    • http://popularchoice.space/crystal_report_runtime_13._0._25lumwp.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/dunkin_donuts_frozen_hazelnut_coffee_calories.pdfIn PDF document text
    • http://afracheat4.xyz/511385738822vuh4.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/nedebutisepijo.pdfIn PDF document text
    • http://lidlid.xyz/56655825096swhes.pdfIn PDF document text
    • http://fringigejy.site/can_you_lose_weight_fast_on_a_vegan_dietur4hb.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/igdjkjb/hot_rod_garage_crown_hick_supercharger.pdfIn PDF document text
    • http://ita-bio.space/was_mary_poppins_filmed_in_londonwvy6d.pdfIn PDF document text
    • http://trellos.fun/36144470210pm6gu.pdfIn PDF document text
    • http://disclosures.space/everlast_activity_tracker_reviews0qx9x.pdfIn PDF document text
    • http://5coupon.info/wixifebazowo3v6m3.pdfIn PDF document text
    • http://ehaberdevlet.com/melbits_world_playlinki0r9t.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/OQE2xha/bounce_game_download_java_phoneky.pdfIn PDF document text
    • http://keepqifi.space/wofimigavujezfk9u.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/68557502233.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/ghdiceK/awesome_voice_recorder_android.pdfIn PDF document text
    • http://trackcreditscore.info/cursos_de_ingls_en_new_york_manhattanvzju1.pdfIn PDF document text
    • http://rent-nout.site/international_marketing_strategylcxp4.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovika/hcNjbji/fipokeradotirukob.pdfIn PDF document text
    • http://misstourist.info/7303344551nxb2h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ca3238-8d0b-4725-9471-fa8db60888ef/33474858193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55e4802-142e-4efc-b30e-b1228426c0cc/76677805047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6c882d-801c-41f7-9c89-540347b80aa7/mares_puck_pro_dive_computer_manual.pdfIn PDF document text
    • http://xirozaza.onlinewebshop.net/funizozazukogeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d750a4ab-e0be-4ec0-833b-0d7c185c5eba/casio_g-shock_g-7900a-7er.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_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 4820 bytes
SHA-256: 0812825f5053a5ac9c6d99b6066ea76b40b068b1262b536fb506bf47287546c9
font_01_sfnt_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 11036 bytes
SHA-256: a156f08de3fd5654f21fa2542148dddcf565b889e37e3c906e840f461cd2e63f