Malicious PDF — malware analysis report

Static analysis result for SHA-256 23adb405db794e45…

MALICIOUS

PDF

73.8 KB Created: 2021-05-04 08:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35f588bc8761e0850e761a8711265851 SHA-1: d61bc130bd8fbf2f00371b4f475c3cfc9f069d94 SHA-256: 23adb405db794e457a5b6f5b72d2daffa4d3117242a445c68777658209246876
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially obfuscated, suggests a lure related to credit report inaccuracies. The presence of multiple embedded URLs, many pointing to suspicious PDF files hosted on compromised websites, further supports a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF format itself can embed malicious JavaScript, which is a common vector for initial compromise.

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 http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4cb876eaf---80444835435.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e5c49dcd---nujixotopomipakebatoxo.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/19e932861c5ddf51da2c1ec2ad2e357b/dezoris.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082b3ada5fe6---59734675336.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a612f066913070a136dbe131aa5d231c/33192946152.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/de53ea258a4f2b1fe85760e59a7e067a/8226121494.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/8b8ac2dff30342eb937dd1167a9c89c2/losoweparuravej.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160903d2c7f2d8---1394701104.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/515be77d9de76103076f72fc37f81ffd/jijujotixamuka.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608720ac876aa---sebemuferowojuri.pdf
    • http://alexhofford.com/temp/files/file/dedilomimawovudufew.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/fe2468d37b1c633de30cd85ebb553cb2/kawutisedogeginu.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/dn2q6ofv7kl2if8elf48fo0df3/8066484658.pdf
    • https://airshow-bg.com/file/46492607640.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/d5f317273d93436ea402aa70d245a342/memiwemedefudalozikudasa.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/3j977b615cgtagud2mba94f0p9/3864178909.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/262afc4468bcb412c95ed247fe5287d4/sabon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+fix+inaccuracies+on+credit+report
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e495.bin
700346b4e4aff25223059223305009ca5855e2e30d68bf305068fa8b25dc32d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE495 5236 bytes
font_01_sfnt_off0000f68e.bin
8a28ebfa1e8b4d6d94a5f812c2682280e54dd4812a5433cbad5ef615a3e55502		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 10372 bytes

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