Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f6e8012106a16e…

MALICIOUS

PDF

103.4 KB Created: 2021-07-19 23:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d55376c5a66a362f568a44f7df0ed80b SHA-1: b2edbdc08f594e9665125a3d9ca12bf87a77a354 SHA-256: 55f6e8012106a16ee9ca59bb132ae49145b9eee5a746511456bb8a1b013756dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used as a lure, likely for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c879d2102---24961753569.pdf In PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/dc3ffaa0becfad8c0939f0f7333f48dd/62434255316.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/gupagesaxa.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609647b3abbfd---jafonopop.pdfIn PDF document text
    • http://askort.pl/Upload/file/silumosamomexigu.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/dibewokaretov.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ea23cee91---xuxotiwusikagopugebenev.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c317f3087fa---2510827119.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebeb107189---zisexosovod.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/19830983778.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/fijigukopag.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/26681307536.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/meroditisofalum.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c6f5a1d49dca70834753e64e384929e7/376101642.pdfIn PDF document text
    • http://lawngo.net/fckfiles/vibigolebepolavokis.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/15859138683.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/26f4eb25190d77490cb9ace408c37592/dokedoje.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087638a3ce4d---gusoxalabokegodi.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0b22befbb---kamemevekijema.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/13a7920e4099304b525a6ceafb55c819/voberojalarikogeto.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/o8mdanmfmussc07jst8tsfrv77/62481882721.pdfIn PDF document text
    • http://foodchemsino.com/d/files/24910320274.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/49073529102.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/linemoxab.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/8c07a7764697d08e958b30f50116e633/86703084982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=eternity+invading+timePDF 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_off00013646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13646 16476 bytes
SHA-256: 3edf2480f89d56a4caf58bca399743cb26d831ea24647d92d316f171616261c7
font_01_sfnt_off000160f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F4 10420 bytes
SHA-256: e9fde27824aff22adaf42d1cb1ecee2895935bd4b5d1b9712b1ab1680864b465
font_02_sfnt_off0001784f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1784F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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