Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b33672bc799c39a…

MALICIOUS

PDF

70.3 KB Created: 2021-02-17 23:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a762fc4bd5e4610a9ea2cf5d8644df6d SHA-1: 460a786b7fd78f809579f861468c0e0e89a1916d SHA-256: 9b33672bc799c39adfd7df87bc79f034a2430b943d1b0b2a6bd7a2ad3edcbba5
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to a PDF document. The presence of an external URI indicates an attempt to redirect the user to a potentially malicious resource.

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://jottigo.ru/123?utm_term=living+with+the+himalayan+masters+in+hindi+pdf PDF link annotation
    • https://cdn.sqhk.co/wujakegu/Rtifggx/78924649782.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5ff3adb45b159.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/DkicUPT/pumixiligix.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/5icKjgr/nunovimuzidubivuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/Lpijmih/83070161830.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/jIpEGgi/393_wordsworth_ferndale.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/bZhdhcw/sony_apple_carplay_and_android_auto_media_player.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408321/normal_5fedbd5761622.pdfIn PDF document text
    • https://cdn.sqhk.co/lolumebitana/ijhjbjf/89214543859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_602bf9c80204f.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/bolovopizonuki/68329476319.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/past_simple_exercise_7_regular_and_irregular_verbs.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/audit_and_assurance_services_15th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/bmr_long_form_in_marathi.pdfIn PDF document text
    • http://gezexibubaju.rf.gd/vabaxesewivemunefij.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/hurt_feelings_report_joke.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_off0000cd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD49 5648 bytes
SHA-256: 6bbfc52624a204344607c60f888814f3b552c56ededd1e8cc0826cab52044446
font_01_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 12064 bytes
SHA-256: 07f13a27ee1fc6eae36a32ea93cb1a2f4984b14e55262fe3b40d8f0110ab8a24

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