Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a220db5b8c5aa76…

MALICIOUS

PDF

82.8 KB Created: 2021-07-31 01:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 0229686097746de564771373f1d86ce5 SHA-1: 8cf6a65fa6c63e1da7fcdfa0de290a420bf27390 SHA-256: 9a220db5b8c5aa76b8cd2aaf15e7eb322e12e4000260daaeb623e24a05b4e24d
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised CMS upload directories. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://foodphotoshop.com/userfiles/files/31104898910.pdf In PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/cfed0a60dd8ffc3cf5aeea3da4a2f012/tisalexusa.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/benokebixet.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd70e0e437---37727410417.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/41343224300.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/69f96c0a964e407be4ed0bed9c18fd83/20995899826.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a10266c09f0dda30ba28433e461f15f2/sobuvuze.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/88658717177.pdfIn PDF document text
    • http://slsnn.ru/content/file/15583887398.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/pelemelakate.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/5eilrfu7rs0ti25k9r2e0u2i55/68415192140.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sanazevifizex.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/kqv3qfb1n4f53vioameu0jo1t1/jerisetukivodifexalixixa.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/qe54k9bv8nbnonv6pbp7ieo987/zorove.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/ripapilebadaginofimudixi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/7252864540185efebc43360f278bf53d/35839368518.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/bakusofe.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/depunafufibigevadaxirenu.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/8ee1bc198e02228492e6901850b3d8f8/kunefulafekafud.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c6491c39d---87997506525.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/zukobiloganiruwugosidob.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/lesodelejipaxanivudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+you+play+the+cup+stacking+gamePDF 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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 16200 bytes
SHA-256: c6f1ff7c774926afb98dc3794a0176ab251ea750624af08502fd7532c87faf15
font_01_sfnt_off00010abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABC 11244 bytes
SHA-256: 25de81b095c6a09a55b25e015445287be62f9bafbd4ee0240cb69b24e517301b
font_02_sfnt_off000124c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.