Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ee9d5a6e275119…

MALICIOUS

PDF

73.7 KB Created: 2021-09-17 18:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a5016d8542cb42e2411bb4771e4ac5d SHA-1: 5399b9aa3e06942a9c8489c9f1cfa1d6834611d0 SHA-256: 94ee9d5a6e275119578393918765343ead11b600e940ef086e36a4741278692b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs are likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://crysiq.ru/uplcv?utm_term=how+do+i+transfer+data+from+my+old+phone+to+a+new+one
    • https://tradingphrases.net/userfiles/files/58790029214.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614275eea9c3e---7445308113.pdf
    • https://capecoralliving.com/media/file/rezujanamuvunawesarupoju.pdf
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/51756375227.pdf
    • http://gleb777.com/fck_upload/file/wadotikagobatesivezefi.pdf
    • http://holidayservicemarsala.it/userfiles/files/sijisebusulobidafi.pdf
    • http://marketypik.pl/zdjecia/fck/file/23336324842.pdf
    • http://raffaelecavazzoni.com/userfiles/files/zovilelokitesovana.pdf
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/42740924273.pdf
    • https://markmont.eu/editor_uploads/system/files/duwarem.pdf
    • https://mosallaesf.ir/uploads/ck/files/sitalinudegi.pdf
    • https://crownprolaw.com/userfiles/Proj_Name/files/napobulafiponota.pdf
    • https://pisangmanis.com/contents/files/59608083626.pdf
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fatuwaju.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133944fef3e8---kapik.pdf
    • https://nhahangphongcanh.com/uploads/files/26684462750.pdf
    • http://nail-free.com/ckfinder/userfiles/files/15256875460.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/tpgumbtt0qvr7c16i83ij9iskv/libegitawetu.pdf
    • http://bibikid.ru/upload/46513381588.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139adfd92cfe---82207781997.pdf
    • https://www.gico.ge/ckfinder/userfiles/files/28828147668.pdf
    • http://bancasemecanino.com/userfiles/files/sogubatukirovitelimase.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc7c.bin
e7f0674e7375079defe57647079c6b0a81ea8f45b615e93fca1d8c9337aba3b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7C 10952 bytes
font_01_sfnt_off0000d5b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B0 16792 bytes
font_02_sfnt_off0000edc2.bin
f00f33199c842d183b63b663b92b90c45faa1e3767d92b894128f62317992901
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 16824 bytes