Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e479eb6cbbc4f61…

MALICIOUS

PDF

112.2 KB Created: 2021-06-24 09:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fea5aeb627fe9907a5632ae1faa18a86 SHA-1: 545b24c5b9e5a440aa03931da12cb44d27fcb347 SHA-256: 6e479eb6cbbc4f61e00e13825b17a3c6ae72ba54608fb3928d3a34cc824f6557
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/15f5f7091f24607250631788eaa76f8f/2342576225.pdf In PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210621_27C1BD45616CC881.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/106b225ea534073483f489ff783dc878/gogogikupadumupujip.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/25/file/20210525_232206_146.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vg3j4c3ah7hvn5qovfsp31s4i0/pekuwofafez.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fff0f3d171---31422650757.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/wasafazute.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/zezax.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/g3go0i14o70psm0s30e15ng54f/voxodupowukifebifukan.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/76629325130.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/ce55ab45fbe2fb280d6f0c8cc069611f/36071100224.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/62789582587.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/cf450350e87431945424ef6dd1da2402/14612009482.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892ea08180a---vedemazaneverepagadi.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/14411211376.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874c22b741c---20482817590.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=departure+form+india+pdfPDF 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://scripts.sil.org/OFLIn 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_off00015954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15954 4976 bytes
SHA-256: 7104b8eb2858bea925ba4d034060e92c22cbc0d53844448f3db61a8d9d87b21c
font_01_sfnt_off00016a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A2F 14464 bytes
SHA-256: c8808b1384db7e4258fae4fb8f9aa3daa763d1586eb523c34f42afcabf74829c
font_02_sfnt_off000198a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198A5 17740 bytes
SHA-256: b77d561eb3432deb52eed148a1b7c195359224b42a0bf7fd0e626b66e1ac304d