Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ae680d79589e98…

MALICIOUS

PDF

79.8 KB Created: 2021-03-10 19:34:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 304f3f4c38cac88c3f57841ee6125073 SHA-1: a72282b95f01ce6478609956bce0e8b3218060d9 SHA-256: 46ae680d79589e982dddd5542478b66afb9e44eed229f52e6ae1064bd68a18ac
252 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document download, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external links suggests a link farm designed to host malicious content or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=ccrt+art+and+culture+notes+for+upsc+pdf In PDF document text
    • https://cdn.sqhk.co/kizofapekeku/pjcfgil/wood_turning_lathe_for_sale_cape_town.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/9690ae7db.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/wazugaworoxevug_sudepano.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/sat_english_grammar_practice_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/fxidmNF/idle_workout_apk_mod.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/57197424447.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/los_medios_de_comunicacion_actualmente.pdfIn PDF document text
    • https://bixolajulepu.weebly.com/uploads/1/3/4/7/134746591/litubuginomul.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/47306002803.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/29159838237.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/3674645465.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ff52a2-283d-464b-a9ec-6db5bf2019c7/75231300988.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/65837284400.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/candide_voltaire_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6654b02e-d761-43b8-ba95-becf3725d1f6/how_to_have_a_great_relationship_with_yourself.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e09031ca-4318-4905-8152-7e3235a5dd2a/kitchenaid_artisan_mixer_pasta_attachments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b424d03a-02c7-48df-a95a-7cffc4f534d4/geissele_aimpoint_pro_mount_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c7ca7c-f853-4f83-9f44-a14b04a526b9/why_is_digestion_important_in_gravimetric_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c033c2f-1de2-455d-838a-cc9497ce3499/muxijapenovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ed1428-5783-4a9c-a64b-17afb556035a/kabofezodisox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/018811df-fd4e-46fd-91f8-46956604789e/vibozolinezu.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/61275325147.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 5008 bytes
SHA-256: 34ae41ad3c1c6315e86a690f6ad8c87ad4809940e633b6804784de4ff8ba1afc
font_01_sfnt_off0000f5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 10088 bytes
SHA-256: 14d776b749bb03a646cd74ebe42a9645c0eefc2cd5760c098b5923d36f8b695f
font_02_sfnt_off00011851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11851 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_03_sfnt_off00012652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12652 2684 bytes
SHA-256: 37aeb85d01896bc783f600629dd55af906efd7a93388b2225c52c7c02a8b8bd7