Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fec1f746274b4b…

MALICIOUS

PDF

70.9 KB Created: 2021-06-12 17:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19567fca31ce004674b3e5ca261a2d1e SHA-1: 26a6657d3836cd37d643730e04ea53c66b1f44fb SHA-256: 30fec1f746274b4b449e876bd45857ba10117d97f4a81f74e6e7fbb87bdf127a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The embedded URLs are designed to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/uplcv?utm_term=computer+scrolls+down+by+itself
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/15af2053b0ccd0ca80c04ce56931b744/49826780046.pdf
    • https://wavemed.it/wp-content/plugins/super-forms/uploads/php/files/15103ae1f5a3b1adb343e9ebab631e82/97497222239.pdf
    • http://nowyhotelik.pl/userfiles/file/valadivejul.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13429c685d---dejagopumowowuriker.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/e54e5300060e3a2a64d79bd9e96f2957/xokobulixegininu.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/nk7docm412nagfc83821gm8ph5/sejujulupegifoxozebemekim.pdf
    • http://box8websites.com/ckfinder/userfiles/files/95656337707.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609c29130ccc6---falexusilarapuvij.pdf
    • https://alamansyria.com/userfiles/file/riremoduso.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/bb8ef4f1a9b3b18389612b8f50179d36/fijesusebamisabe.pdf
    • http://dentherapia.hu/files/file/34851222091.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/22541372066.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda283117f---26460960912.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160778cfc1d29d---9466876776.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/4506425571.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160820dc2b7133---tosuzoreladijaloti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7dd.bin
aa78902fcaa881bf8c82db64defd3bdde891b48fbcfdda201c8175c0498cf2a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 5332 bytes
font_01_sfnt_off0000e9f9.bin
26ff74bb64e4ce972c4e5f19b8adb97cc693ce600b728135280530befdb9f633		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 10916 bytes

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