Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2313eb0006eadf…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 03:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5db11a824bb35ac4676ffc773ead5d30 SHA-1: 126e3861e6ea6b03f4dbb443df5d212d4bb6be59 SHA-256: 5b2313eb0006eadfaea80595207e4fd97fec174f19f9c47a212fd86394b35c4a
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically 'https://nipisod.ru/wix?keyword=bosch+ascenta+dishwasher+she3ar55uc+manual', which is likely a phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further supports its malicious nature. The document body, though heavily obfuscated, appears to be related to a dishwasher manual, suggesting a pretext for the phishing attempt.

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://nipisod.ru/wix?keyword=bosch+ascenta+dishwasher+she3ar55uc+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fed6413b162e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_6019934a61ffe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_6042d267dae10.pdfIn PDF document text
    • http://filmera.ru/gozafimexubamatet7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380536/normal_6007bdd9b0532.pdfIn PDF document text
    • http://ruzalonuxow.22web.org/fusionner_2_fichier_en_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_6057e2963db02.pdfIn PDF document text
    • http://jolilibigir.22web.org/picsart_latest_version_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_601591d56c84c.pdfIn PDF document text
    • http://fbcopyright-center.com/mens_air_force_1_low_white_size_11ozi7w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465919/normal_5fee0ee60d090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421061/normal_5ffe4b03ee358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461744/normal_5fefcad6e9a32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_8793641faf574024a3113ea42490220c.pdf?index=trueIn PDF document text
    • http://subumopu.rf.gd/chez_nous_textbook.pdfIn PDF document text
    • http://ruxofepugoloma.rf.gd/westlife_songs_mp4_free.pdfIn PDF document text
    • http://fefipunoz.rf.gd/vivakubijibanexoxofemun.pdfIn PDF document text
    • http://mopuxogimofuzu.rf.gd/stephen_hawking_disease_genetic.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_efd32e4939334a21bccfa175b5cb2fcd.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_ce41b1db656144ada5783cb25b22b1ae.pdf?index=trueIn PDF document text
    • http://metorudadoz.rf.gd/american_standard_hvac_installation_manual.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_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 5608 bytes
SHA-256: 6dba1a30f2d0a26fb9358bf22b496c9460f54263a796cc88c696e10ea4c2a009
font_01_sfnt_off0000f821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF821 11616 bytes
SHA-256: 063ab2d40622f8b805b189ff4ab76820b7d99fcf20e92bab63e518436f9213e0

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