Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abade18bdfd6d0a…

MALICIOUS

PDF

70.8 KB Created: 2021-09-30 21:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 84acad06354981e2cca16c14a0c31908 SHA-1: 76c32e2a07bb657aee07706f5a7acf4234b6643e SHA-256: 3abade18bdfd6d0aceaaad63cf68d6b4a391df74a22559328fb9405fd4380694
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely leveraging embedded JavaScript for malicious actions.

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://philabc.ru/uplcv?utm_term=older+version+apk PDF link annotation
    • https://tagoproperties.com/ckfinder/userfiles/files/diber.pdfIn PDF document text
    • http://anpharma.net/upload/files/vobemerafaduwipefotabin.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee75630fb2---86328905817.pdfIn PDF document text
    • http://sintniklaas.kinderopvangpimpeloentje.be/ckfinder/userfiles/files/25379237480.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kediguzagitu.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/belugoruv.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1ec0b59ea---dofaruwokijekatoban.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/12295073381.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/fijokulotu.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/mexudezo.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/37589785760.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/19226990551.pdfIn PDF document text
    • https://windsbs.biz/files/file/26225838241.pdfIn PDF document text
    • https://777mto.info/contents/files/65232847696.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/pokotamonepewoj.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/97743925558.pdfIn PDF document text
    • http://sunway.me/uploads/file/200639067465.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d38069f3f---18887628462.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/47352813121.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/48291819752.pdfIn PDF document text
    • 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_off0000b19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB19F 10468 bytes
SHA-256: 7b5a421b016ed317cdfbeec046c5f214ef1bcbd855e8d6e79ae708a8752b0518
font_01_sfnt_off0000c978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 17292 bytes
SHA-256: 0f4cbc0a95dd377c7165a920b703746c2488227fa4cb166785dbaf6318273638