Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc116cb2502d2a56…

MALICIOUS

PDF

141.6 KB Created: 2022-05-30 00:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 56a7401f085754e6c459a4c276d0b770 SHA-1: 3c0fc401d5a632288a0eab9be3e82781dc8045b3 SHA-256: fc116cb2502d2a56af84974e2a6d239d7564fc7cedec367c57282668c43551a0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. A PDF_URI heuristic identified an external URI pointing to a suspicious URL, which is also listed among the embedded URLs. The document body is heavily obfuscated, preventing analysis of its direct content, but the presence of malicious indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

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://lovig.co.za/XSRYdR1H?utm_term=usmle+rx+qbank+pdf+converter+online+converter+10
    • http://tzsunup.com/upload/53522540133.pdf
    • http://celox-st.hr/sites/default/files/fck/file/lapemaxapopupa.pdf
    • http://kingkady.com/uploadfile/files/52664654205.pdf
    • https://illustrations.noche.fr/images/files/dadivigefokar.pdf
    • https://ranumurubakek.weebly.com/uploads/1/3/5/3/135341533/a02351fd2e.pdf
    • https://zowagupiwu.weebly.com/uploads/1/4/1/3/141333214/5912c47d02a.pdf
    • https://nogutupevawas.weebly.com/uploads/1/4/1/7/141703256/kanolejutelejaduwim.pdf
    • http://www.imcet.org.tr/kcfinder/upload/files/71325103860.pdf
    • https://sincomerciariospv.com.br/kcfinder/upload/files/kobukefavorogekagekom.pdf
    • https://verdadeon.com.br/kcfinder/upload/files/mejozalasodow.pdf
    • http://tnet.site/kcfinder/upload/files/vebivefole.pdf
    • http://acrclubinversores.com/files/galeria/files/pokejigob.pdf
    • https://valenciamaids.com/userfiles/files/27684327831.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620168314d4c1---64501166217.pdf
    • http://pasted-radio.de/web/files/bajivenalefigalibaliw.pdf
    • http://philippetardieu.com/kcfinder/upload/files/dikogoramex.pdf
    • https://unityofmyanmar.org/images/files/rojud.pdf
    • http://dmpenterprises.org/app/webroot/img/uploadfile/files/24018250988.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/162651056266ba---54875777915.pdf
    • https://tuzufivogov.weebly.com/uploads/1/3/7/5/137518576/jatejoreli_nesetozudut_noxata_xebewudiruxikej.pdf
    • https://midefadi.weebly.com/uploads/1/4/1/3/141328859/890144.pdf
    • http://satakantaresort.com/user_img/files/63683897508.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_off0001c8d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8D2 16792 bytes
font_01_sfnt_off0001e0e4.bin
20bdd5020d1b8b24c166c5697ce0b784699b7ae73679e9eaf29b4a033f62e75f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0E4 16744 bytes
font_02_sfnt_off00020c1c.bin
cbcfec419a72f47c15c290cc871eff5a30064f44a59971d56184544c8755c46e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20C1C 11508 bytes

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