Malicious PDF — malware analysis report

Static analysis result for SHA-256 216adede40a87156…

MALICIOUS

PDF

132.9 KB Created: 2021-03-28 00:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55106f6ddc39e3e139e990f42b8ae200 SHA-1: eba938e10614146776041beb181a0b4085c1be6f SHA-256: 216adede40a87156e8f3ac74e2e394fe80899e2e4aa6c67c111072819f5c9e4f
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, 'resalured.ru'. The document body, though heavily obfuscated, appears to contain text related to 'The Handmaid's Tale' and the wkhtmltopdf application, suggesting a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=the+handmaid%2527s+tale+nick+character+analysis
    • http://leafester.online/lumusigupiloxusinulnmtq.pdf
    • http://letnesil.xyz/how_to_pair_beats_studio_1_to_iphoneawdsq.pdf
    • http://ompala.store/understanding_how_business_credit_workshoprx9mm.pdf
    • http://leftoutclub.com/pimolevagokadarosuwifasibh4kht.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuzamada/net_30_vendors_that_report_to_dnb.pdf
    • https://s3.amazonaws.com/jedobufudajewu/short_abbreviation_of_former.pdf
    • https://s3.amazonaws.com/lixasifasi/obosheshe_album_songs.pdf
    • http://gujemewemavud.rf.gd/ricetta_dei_canederli_al_formaggio.pdf
    • https://uploads.strikinglycdn.com/files/53b0c155-96d7-4c1a-960a-0fd8d5721020/luxor.pdf
    • https://uploads.strikinglycdn.com/files/0923db23-1227-4107-81d7-7e78fb3200d4/bilasepiwosidisixiw.pdf
    • https://uploads.strikinglycdn.com/files/d45f6b12-3f69-4633-8267-6787e48526cf/manual_de_gestion_de_calidad_iso_9001.pdf
    • https://uploads.strikinglycdn.com/files/2eaeea23-0f62-4b45-8ec5-35d31a634305/casio_gzone_flip_phone_battery.pdf
    • https://uploads.strikinglycdn.com/files/e1a45e37-f538-47e6-b500-5be9d3105ac9/27608407646.pdf
    • https://uploads.strikinglycdn.com/files/1423166b-f295-4cc4-8ab3-20a9ea99a9de/what_is_pbl.pdf
    • https://uploads.strikinglycdn.com/files/58c78def-0add-4b42-8de2-910c0b9cc088/english_grammar_in_use_for_intermediate_students_by_raymond_murphy.pdf
    • https://uploads.strikinglycdn.com/files/4c23c655-ce41-48c1-abad-a7d6ad128a32/dotitinebagap.pdf
    • https://uploads.strikinglycdn.com/files/954576d0-38ad-487e-832c-c51a5213ab30/cooler_master_n200p.pdf
    • https://uploads.strikinglycdn.com/files/336c67a8-6155-4a37-860e-1c1928e02a62/20849777448.pdf
    • http://denuvadejo.rf.gd/89257674331.pdf
    • http://witosef.rf.gd/fimasekawid.pdf
    • https://uploads.strikinglycdn.com/files/314b74d6-dde7-4aea-926f-5125a561879e/how_to_address_a_letter_to_the_board_of_selectmen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ce26.bin
16a5c940a87f26e1308eae9b24b5f9620f5161c2a07540bf7d6bb41e3372be84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE26 5328 bytes
font_01_sfnt_off0001e029.bin
cb420d3342b48e6b29f1223682da92aebf3a4b869e58cbdc2220af3e240fe6a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E029 11044 bytes

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