Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba17015fedb47538…

MALICIOUS

PDF

70.1 KB Created: 2021-05-06 12:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8579e8120286c3b4808afdf17bca7a68 SHA-1: 77da71abd515286d584b798e8cf90f242977d26b SHA-256: ba17015fedb47538ab6949caaeb9102380435171ebd5d75be863711ec5e24d0e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains numerous links to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to international adoption, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b14c6d421---renirulit.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/463ff4a54684c30dd90140ae371ce724/rupisaxibojim.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/58fp4socek8smvm87vgj1k4ft8/nekijunedijuzigogejadegi.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4c918f2de1d0c6ea9d206800422141c6/gobotepisur.pdf
    • http://aj-logistics.com/stock/userfiles/file/melumukijalimew.pdf
    • http://afgventuregroup.com/cfiles/file/18277897182.pdf
    • https://llsindia.in/FCKeditor/file/51422409798.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/7fsl743fk8bj1pbh26geg7ivmu/44825027471.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/8c79cb9j0alh1iv6auv2ukdpl2/wumejepidilalaj.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/d6013c7cc026a701848dfa19c8348aa3/50492236920.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/8kiqfgcod6i970jb644ajb7e3o/86008505110.pdf
    • http://etcad.net/np/upfile/file/zapetofitali.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ad8c188d396414e0b27da21c19504d51/59563300141.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1e3fafe4bdfe78085cda9d95e4a603ce/15770086726.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160742a139a853---wijudojubibi.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/la6pgsac5nri1jflb02fuqq7gs/58574573691.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=international+adoption+facts+and+information
    • 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_off0000d62f.bin
954b684152b8ddc02487b158bacd6341f891c1d81a34a1870ca05d56bbfeedf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62F 5236 bytes
font_01_sfnt_off0000e7ea.bin
75ea4bf580a2244c5761a256c7c937a7588dde09d00045601a72fc3c5d8f9f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 10388 bytes

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