Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff2372d1834f613…

MALICIOUS

PDF

73.9 KB Created: 2021-04-05 05:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2a606f87615c8b808be36cbf3c20bca5 SHA-1: fd313382da4271de656947a61409c8d95a146f08 SHA-256: aff2372d1834f613d7fda09ee1f00c13197d60946d64755f2b12335a03dd5a4c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to a repair manual, suggesting a lure to trick users into visiting the malicious URL for potential phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=1994+nissan+sentra+repair+manual+pdf PDF link annotation
    • http://onesmall.space/assembler_plusieurs_en_1_seulujzes.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/zabidudigovep.pdfIn PDF document text
    • http://gratoram.site/mamitizutofultjqck.pdfIn PDF document text
    • http://nuverlites.online/zetatakozo12eky.pdfIn PDF document text
    • http://pelistens.xyz/vida_fitness_official_app_paravwar3.pdfIn PDF document text
    • http://detonic-ro.website/warcraft_2_cheats_playstation_1vv2b7.pdfIn PDF document text
    • http://lemiritafuwab.22web.org/wimopekitixogamareza.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://dressnbuy.com/igo_navigation_card8djow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9eb8e79-97af-4b75-8e88-c1cb671d28e2/vofufatomeledudul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0d6808-cb79-4203-a91b-97357e216e2e/rheem_tankless_water_heater_error_code_c4_13.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/1-_300_blacksmithing_guide_vanilla_wow.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/hybrid_beamforming_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/xelixowisirawasawox.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/funny_memes_template_tamil.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/standard_employment_contract_form_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/zomopekirabobemewazive.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_off0000e494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE494 5388 bytes
SHA-256: bd1273a0a27a0a369e873a6164ad1b154a2bfcfbff20c44e73846fb4f6df43d1
font_01_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 10492 bytes
SHA-256: 0ba9565f76ec526c98db45b27c8c3697698e44c4d7d800e75edc1803398f0fd3

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