Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bec9c5e78da1ca…

MALICIOUS

PDF

72.7 KB Created: 2021-04-05 17:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f95a3a12eec6a04222f2df2fac109d40 SHA-1: ee0b397456a7ecd2a8a1dfd3e9c5c7c4525c6a90 SHA-256: 74bec9c5e78da1ca83901e70b47b074b859312783bc6dc982e4df00aff7ed6a4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. ClamAV detected this as a phishing trojan, and ML classification strongly supports maliciousness. The embedded URL 'https://leonvi.ru/strik?utm_term=how+to+turn+on+badger+insinkerator' is the primary indicator of malicious intent, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/strik?utm_term=how+to+turn+on+badger+insinkerator PDF link annotation
    • https://cdn.sqhk.co/tokarikadez/jaf2DaY/16740368283.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/cn83MlP/roku_ultra_walmart_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/juxajomuz/ghjfqie/43748811544.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/lzjajai/61091703625.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/jgiglih/oscar_health_plan_provider_search.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_1fd6efb0a74b4df68914fcc59402c0a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/truth_table_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/pusevoteregusij.pdfIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_949de45ea23541a1925f868965300828.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/666187459.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/history_of_ceylon_tea.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/what_is_sat_exam_for.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/neril.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/intervencion_en_crisis_psicologica_definicion.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_faa651a0e1f743ceb2f3c2e573bc0da7.pdf?index=trueIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_700eb3d36e8b48e399f6937ac6c23c88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/android_developer_jobs_in_bangalore_immediate_opening.pdfIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_6d7ca09492f045d597e5b196b6cb3828.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/46840280120.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/ritunag.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_a9e99c5c3b124989aed1d1ae6b652a7a.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_2639f7e62e6f4146a48c8c03ac30b279.pdf?index=trueIn 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_off0000dc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC78 5220 bytes
SHA-256: 2df5bfabbd6b5a7f42d0b62815eb981e8263e08ff3ee0c94548060c94c5b7d7c
font_01_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 10956 bytes
SHA-256: 7d303bb24bf575ac0d47a0bb10d8ee26763e4bc80a520d9bc665def9bd964410

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