Malicious PDF — malware analysis report

Static analysis result for SHA-256 725b3d0accb0ea00…

MALICIOUS

PDF

101.0 KB Created: 2021-03-22 03:39:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 50ce92d2ef7f58ff1f74f7862f32439a SHA-1: 1b1c0eb29f1f4aa78864df9504ea91fe47a8ed2a SHA-256: 725b3d0accb0ea007c9cb01fa21a69581885c609d8cee1629a8187c40535d313
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM' containing 30 external links. The embedded URL 'https://leonvi.ru/wix?keyword=mr.+badger+%2526+co' suggests a potential phishing or SEO spam lure. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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/wix?keyword=mr.+badger+%2526+co PDF link annotation
    • http://sejujanovemo.medianewsonline.com/formula_del_acido_cloridrico.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/legetuj.pdfIn PDF document text
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/44883be.pdfIn PDF document text
    • https://tigopovon.weebly.com/uploads/1/3/4/2/134235173/tafevabewiwixava.pdfIn PDF document text
    • https://zopiwaseka.weebly.com/uploads/1/3/0/9/130969839/sokufijofubusi_pesipuv_mopifiva_fikopoxofoli.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/alkaloids_extraction.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/zuwosil/jafiwa.pdfIn PDF document text
    • http://jenuvuzawo.epizy.com/gate_2018_ee_paper_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/dbz_goku_vs_super_android_17.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/98134206982.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/xikobesi.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/oster_oven_french_door_costco.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/graphical_description_of_uniformly_accelerated_motion.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/xokiwobipowezaw.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/polk_audio_magnifi_mini_app.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/australian_tourist_visa_application_form_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/komoj.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/payment_receipt_letter_format_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba70e2b6-57ed-49b3-97ad-0e40410b7313/how_to_download_music_from_spotify_to_mp3_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cbb0d81-f10f-4ba1-b881-07a9a1820717/the_secret_history_audiobook_free_download.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_off00014fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB4 4960 bytes
SHA-256: 7d1d4356304212ae59ff623507b9533ef26798604e46b8663e6985471661f6ff
font_01_sfnt_off000160b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B3 11296 bytes
SHA-256: 0f35cd5adf1db5169e30ee91f27376c14e15585f0a378b8ff37fff814862f538

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