Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d45203b06fbc9c…

MALICIOUS

PDF

108.2 KB Created: 2021-03-18 21:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a3e729420429b0294bdb29c187e9eac SHA-1: bdcf7cd04aad86a73aff46dc9f157a67b28f560f SHA-256: d3d45203b06fbc9c81d80c0168001c0e6590dfb46ee6ea12af238bf6d9fb3e4c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily corrupted, suggests a lure related to an 'answer key', which is a common social engineering tactic. The presence of external URIs indicates an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/wix?keyword=realidades+2+capitulo+5a-8+answer+key
    • http://kozizukexepuf.22web.org/80038079046.pdf
    • http://momentshop.space/mein_kampf_hrvatskibe57u.pdf
    • http://dhl-order.info/assassins_creed_forsaken_audiobookp4z01.pdf
    • http://lnstagram-helps-contact.com/9039947847ubn62.pdf
    • http://sarelalitodidi.66ghz.com/dusopeses.pdf
    • http://chambrehub.xyz/706978956086je2c.pdf
    • http://legendnat.space/druid_shapeshift_5e_guidele943.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/654e3ba3-4ec5-4e85-ab6c-83a88922571f/sijebezezobegamuj.pdf
    • https://uploads.strikinglycdn.com/files/5771aef1-6f29-4a9e-9185-92ecafd84652/23061613594.pdf
    • https://s3.amazonaws.com/lomuper/29598837256.pdf
    • https://uploads.strikinglycdn.com/files/55f875fe-01ff-49a1-877c-de56d12f6c50/fasixedigekajeraxikurelij.pdf
    • https://s3.amazonaws.com/jiwisi/acog_preeclampsia_guidelines_2015.pdf
    • https://uploads.strikinglycdn.com/files/842f7e30-a560-46dc-8eec-5a51a0a224f7/optics_textbook_hecht.pdf
    • https://uploads.strikinglycdn.com/files/4c47cf0d-baf9-4067-9a34-7a146d8e4eb6/how_to_enlarge_a_shape_by_scale_factor_0.5.pdf
    • http://fegixifew.epizy.com/bisezanifimuragovibu.pdf
    • https://uploads.strikinglycdn.com/files/9e420c0a-46ac-4a62-a377-059cf16f7418/25324919565.pdf
    • https://uploads.strikinglycdn.com/files/cbdc4283-07aa-4e8f-ad57-f1920d4539d2/32552122776.pdf
    • http://butaxogusevi.epizy.com/2323110939.pdf
    • https://s3.amazonaws.com/mijumomub/excel_2010_delete_sheet_greyed_out.pdf
    • https://uploads.strikinglycdn.com/files/d6731cfa-7c7c-4d02-a3de-c3c38199ae72/how_many_calories_in_a_large_powerade_from_mcdonalds.pdf
    • https://s3.amazonaws.com/veraxawewib/24686459495.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cd8.bin
59c924181d46e80dcdbf6150067c76ce69a36c0b8960d1ee6210fa16e8c12c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 29016 bytes
font_01_sfnt_off000166a0.bin
31ea93dbc97d0d048dc491c2a16f9da3119539df4ad9a599d9a0eabbafbe9c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166A0 5816 bytes
font_02_sfnt_off00017aa2.bin
e5e6bbf3c97a9f781cdcc34f62d928359023bf4f16a4ee25da4bacf6a20f973f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA2 11336 bytes

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