Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef32566882ac23ae…

MALICIOUS

PDF

115.8 KB Created: 2021-02-28 13:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3539ac978b1b6bf40ab73384cb82eaad SHA-1: c6db00e665cdc6e327bd3fa5eef7756b823cd876 SHA-256: ef32566882ac23aefc0aecef21a2d6138aca514a6b40fbd5b8d7c355225cc075
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, flagging it as a phishing trojan. The document body, though heavily obfuscated, appears to be related to a 'PSN error code', likely a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=psn+error+codes+80710d360 PDF link annotation
    • https://cdn.sqhk.co/bepesewutu/b3tj9G7/65651415980.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/VifiihN/wozisagisewikigatituwomew.pdfIn PDF document text
    • https://cdn.sqhk.co/biposuba/cAgfgjE/92249247017.pdfIn PDF document text
    • https://cdn.sqhk.co/jategesil/d6haGnC/pasowez.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/nDiauic/lugusuxorej.pdfIn PDF document text
    • http://profaudit32.ru/the_magicians_alice_et_quentin4nb5v.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/iciephc/zikeboravafuzereles.pdfIn PDF document text
    • http://islandlandscapesbb.com/dr_sakis_wikipediabyn69.pdfIn PDF document text
    • http://cashtanks.fun/roland_tr8s_used7g1iw.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/ibNHmhh/xaxavajubewoxigorubalu.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/nitajosasa/98185664328.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/nosowopebufob.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/40448045934.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000189e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x189E5 31200 bytes
SHA-256: bf978f6b28245d6c54821f4d64de4f2aec17cd6133e86e871f57a59c610dff61
font_00_sfnt_off0001467a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1467A 2888 bytes
SHA-256: f7c768458a26e9ef562858d01fa00611e0c7310d4e9849af27157a7c321f0ba5
font_01_sfnt_off000150bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BC 5480 bytes
SHA-256: b906acf62a673cf36da8bbb8e4fe85b1ff3d477ca3ad13de54b3b18e38718045
font_02_sfnt_off0001637d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637D 11628 bytes
SHA-256: 26ff156fe9fe92d63e55be2192541f8a3d879d9e5fbf44d98e2b49473136cb3d

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