Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e78f61ae5ebd92…

MALICIOUS

PDF

85.6 KB Created: 2021-07-14 09:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcc7c0056ced1060175132945bd14cb8 SHA-1: 2f731199df0071099c7db67391fb0dd016f376f8 SHA-256: 53e78f61ae5ebd927b9e229edd7325052a99aa4129da6d4d2bec8389044194ae
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'SE_PAYMENT_REDIRECT_LURE' suggests the document's content is designed to trick the user into changing payment details, a common tactic in BEC attacks. While numerous URLs were extracted, most are confirmed benign, and no scripts were found, limiting further analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://feedproxy.google.com/~r/sq/ugae/~3/gOBB6uaVNRA/square?utm_term=game+for+life+lottery+results
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed628a50bb312daecd9eb1/1626169994298/tomato_soup_and_croutons.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9b33f90efc25ed743cc2/1626184499930/dixepotu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e872712f604d1a8d8d1662/1625846385213/wings_of_fire_kindle_free_download.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e873e241ef1372986019ac/1625846754110/draw_and_label_a_diagram_of_the_digestive_system.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc4187ce58f02ed9106c5/1626194968751/lease_agreement_south_africa.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee0a3b114e6b7b7de2dd08/1626212924063/durafun.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec79baa3e9df788e6c519a/1626110394271/how_to_use_manual_film_camera.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec78b23f7a034ccb794ef7/1626110130654/33337588574.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e95647e370ac63228a7688/1625904711721/fast_and_furious_8_free_stream.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee7c04df274736e0af300f/1626242052755/ocr_in_word_2016.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7727e0a0d2c023bdbb8f4/1625780862100/nafojefido.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa6.bin
c1a4adb8d2d52202a7381087ec2cd92d2a9005be887aa3b1c2d555010a4d40bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 10524 bytes
font_01_sfnt_off000102ad.bin
763766c69ebcfcf9a04f2e045c9a02cbbfab36ecf8f02544102fe883326b10ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 17488 bytes
font_02_sfnt_off0001308f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 16792 bytes

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