Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5379b3660218aea…

MALICIOUS

PDF

77.3 KB Created: 2021-09-04 04:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aaf9805a30af6e6193b8d179aa428513 SHA-1: 0245de9412bd31bce22a013aee065f88a9247e93 SHA-256: d5379b3660218aea4d64c27aa7bc129b5ad20fa6412c0d9936760583c62430fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://12shio5.com/contents//files/zoxuxago.pdf In PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/kepekanurusasuneruve.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/75153220647.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/jobiwefafakubixo.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/4cc0060625c5480164d9fa8b6cdda05f/52044599084.pdfIn PDF document text
    • http://kodemari.info/data/files/79102082040.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/dc6c7e0837e38591ff987f6da71249d4/mimogiwulukifufor.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/21942922593.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/vumumogurezokoloxiwuniwi.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/julexabeb.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/85683796960.pdfIn PDF document text
    • http://elite-weekend.com/clients/9/94/945a7f92a07ecc721aac768ad340748a/File/viguzu.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/47208195698.pdfIn PDF document text
    • http://sun-tes.ru/files/file/wiseferubogosopegopukiru.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/44243122636.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/f7371cf56f001fe2ff094584fd8e0621/10714223323.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7bdb3cf3f---daxurozupigafifager.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/23456093695.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/suvinodirid.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607766475ebc3---60041354014.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/8ac605749c4f8a4232f3bfe1edc13a48/pepujotirox.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e415391bc3c40b1b0e23e632a52873e6/wovovobupuzo.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077783b6a2ca---9471607779.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lv2kqpf2qlfsdkts959e0rc4a4/bukixobikevagapukasezas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=tbhq+msds+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_off0000cd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 10156 bytes
SHA-256: 8400ba8effef3b4d2eb211aa74614709dbfef49977bfd1ecddc0e9aa8b9c4df9
font_02_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 17264 bytes
SHA-256: 86aeea6d7ad131c20061751a72a7e71c88a55716e96c5a1a65d9834e027e0a2a