Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c9112fec2aa955…

MALICIOUS

PDF

80.5 KB Created: 2021-03-04 21:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 120a15d94a111ba895d9b3eb65beb360 SHA-1: 1000c19f76ba25ad686646a1ce14a9c5fd3f995e SHA-256: 46c9112fec2aa955bca28d5f1d546f7f9d84092bc23aed8b1fcc899a883d419a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crophysi.ru/strik?utm_term=does+cortisone+shot+cause+insomnia PDF link annotation
    • http://worldthailand.fun/dirosabhbo9v.pdfIn PDF document text
    • http://chambreapp.xyz/titikibazenosujamatulogiz277ys.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/f36209251c1.pdfIn PDF document text
    • https://kuxevirajopar.weebly.com/uploads/1/3/5/9/135990570/febimasepa.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/universal_remote_code_for_toshiba_tv_dvd_vcr_combo.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/how_to_learn_phrasal_verbs_in_english.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/terapia_cognitiva_conductual_para_depresion.pdfIn PDF document text
    • http://vitodibiwanezej.mypressonline.com/logitech_g710_software.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/7bf4db102ece2.pdfIn PDF document text
    • http://winoorama.website/0661j.pdfIn PDF document text
    • http://sosed.market/guseramawifonadekabotivsic5.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/schwinn_sidewinder_21_speed.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/what_does_pull_quotes_mean.pdfIn PDF document text
    • https://puwiwasoz.weebly.com/uploads/1/3/2/6/132695956/7771871.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/lexupan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/topipovikapari/answer_love_yourself_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d05e931-7cc5-4f13-9cc7-320b72fe8227/batavanitefiditomokefe.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/wupelaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b40fb22-d1c1-4cda-baaa-37fc2762a600/78590929401.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/40320599035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3f1ebe-931c-4ac3-aefa-cf83673d77e4/95747856540.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/teguxagerini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7a72c7-6c2c-4d33-a7b4-a3a730ea4358/90711229759.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 4888 bytes
SHA-256: 4709340786286ecd2a542b9c2648f8a700e0eb44df21d56447c2ee76981698d2
font_01_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 12428 bytes
SHA-256: bc3ffe7dc01a07a3c435fa06d7c0269e629148704490028f51de9b34cd146bf2
font_02_sfnt_off00012655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12655 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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