Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b5700567823227…

MALICIOUS

PDF

87.4 KB Created: 2021-09-08 00:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3752b1b35d61890f51ff334e011c6244 SHA-1: 2213441d8443bbff03c744774147657bd387ed25 SHA-256: 30b57005678232276e9760a311b7b7c417344382ffea2118eab373897da99257
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous URLs pointing to various domains, including those hosted on compromised CMS platforms. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests potential for further malicious actions like downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://namratalakhotia.com/userfiles/files/fazepamevewonevoludava.pdf In PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/937d4291aee8d59dfb7c14215ef761ce/kegekibexu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3ece898000---23875275977.pdfIn PDF document text
    • http://dgjst.com/upfile/file/67405145080.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/38567437643.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/watixin.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff36de4db2---61557842939.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/ledudekizezozovutilo.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/459eeff01004e6655b7eafe2c27b3e10/45852264763.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/30977751680.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/2632477675.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/ziwodizol.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c06d9900---73717053094.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/kisujojowedi.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/kedinatisumin.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/kuluvexafilivima.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/43429564150.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/1t6fb15cc9hhc0n8d0kc2vu58v/fizaloxitezodikopujulema.pdfIn PDF document text
    • http://safarang.com/basefile/files/lekemazisezekelowemowu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5211e6478---dejid.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/iadmahqkve0vfc1palqova3a11/22567413041.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/liwajokowoluxepipijibe.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/8781223685.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/50323517211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=schizophrenia+case+study+assignment+pdfPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 11368 bytes
SHA-256: 9097c651229874f3ca059498e9acec36f593984dbeb197ca377073ac3b041212
font_02_sfnt_off00012159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12159 17856 bytes
SHA-256: f58e86d5f19a73ed8c66c9ce3c54b6e5029e8c77d7461e9c3d8e289595198222

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