Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ebae09890feeba…

MALICIOUS

PDF

78.8 KB Created: 2021-09-09 02:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6ac5bb55359b024bc549817812d802f4 SHA-1: 9071d6c9c67bcb3138b09f74dffbbcf660dc10ea SHA-256: 67ebae09890feeba732035ac24888e8b4b61279d0c301be548b3605016effa2f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, some of which point to IP addresses or compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42970017262.pdf In PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/75978076820.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/91099997482.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/36969882016.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/16062608895.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/puweforogapefejitibot.pdfIn PDF document text
    • http://bavlas.lt/ckfinder/userfiles/files/25476234752.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/zabufon.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/2c576622e4ba2ed284c77ceb2859fb62/36840608825.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/6432314050.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/78928427563.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/e7adecb42b362ec9405447df1cabe4a1/wazazetizemelizilugogasox.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/5266249999.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/20909606442.pdfPDF link annotation
    • https://ltssinternational.com/res/wysiwyg/file/68687148305.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/lesutafirefojeruxe.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/40225923401.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/wokomosegatibirodafam.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/700f5a9ef339b20690ea461d458b0d2d/pogerozaverowaxawuxe.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/55633618279.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/disepifovutufeg.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210905_702D14A5FF945C42.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/51222627533.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/77124806261.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/59712500527.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/35567902862.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/lolosotipurotawumelog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=chat+secure+androidPDF 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_off0000cf4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE762 10552 bytes
SHA-256: 05c28bad6bfa49f95fda44121866dca67cfa6e970caf84f09614bfd46247a158
font_02_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 17872 bytes
SHA-256: 54f4a2064f3f3911dcb326b6e7f53eb65c1afecb9e9c23a55c5fdb8168989495