Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e03b5cc2295d893…

MALICIOUS

PDF

207.4 KB Created: 2021-07-01 10:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 761d3fdcd64d33b45a51705f729c6730 SHA-1: 4ec18757137ba60086033e39714d9cda7d728723 SHA-256: 2e03b5cc2295d89374b848739b269cfe25212c7130155c59929939f713bf2610
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/7a9e7423877f3089bcc8525a1e1d3908/41017226029.pdf
    • http://atthaya.com/file_media/file_image/file/botuzavufapifowusin.pdf
    • http://www.urbanwaterways.info/files/47459758604.pdf
    • http://skiflogistics.ru/userfiles/file/jajafepiko.pdf
    • http://esistore.be/userfiles/file/totegesule.pdf
    • http://chobacgiang.net/webroot/img/files/xawojowisovedoridogefo.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fad8b0476---91870836119.pdf
    • https://granchefpremiumfood.it/file/dinezutedibojedesirefozo.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/006cs6e3tiu3u7ce1nnpom0ge7/roduzisupolorujapo.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a17bdb04df3---xevof.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b8e9228e4---dukewe.pdf
    • http://interel-rus.ru/test/sites/default/files/file/labumififumonidadejoxo.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160bb02e6d274f---verusodakinologepepetat.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d5a328a4e---44348123414.pdf
    • http://asfalon.com/__files/file/43758994273.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a097e21b4c2---36279489839.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/nt6dr170mdg4fkli75abogb80a/zugifadirumemuwaj.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/f89a0045d1bbbae85902f9527d8b2581/gibigigupimolalimafosigu.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d476eb7f7---mobawuvudijosotugabuk.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709f2d34701---48397426690.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c30d593b456---kobiberefovuxumujon.pdf
    • http://akinmedical.com/uploads/file/567351377.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=12+divided+by+9
    • 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_off0002c13d.bin
9728ee8b42108a4fbb4514a8b833e2d4ffef25975c53b78c69a83097be751da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C13D 29240 bytes
font_01_sfnt_off0003015f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3015F 16792 bytes
font_02_sfnt_off00031976.bin
4b0371cc956681381af23edc7eb40446ca6892752e637cce9190553d5471cd18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31976 10004 bytes

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