Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b0d2c4a5750c22…

MALICIOUS

PDF

95.0 KB Created: 2021-08-15 17:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 62cf0285e03594de338872897209e121 SHA-1: 9c114aff6c2a6805cf20174c3727b1ae80aaa1db SHA-256: b7b0d2c4a5750c22f796cb3a7340ad03d385a919bc43b89a490f443146192717
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 with high confidence. It contains numerous external URIs and link farms pointing to various websites, some hosted on compromised CMS uploads or disposable domains. This suggests the document's primary purpose is to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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=how+to+control+husband+mind+in+hindi PDF link annotation
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/tatiz.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/nejuwame.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/94549160869.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/1sfk0icssddggocp387nt7s5p9/19696516315.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/8004805818.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1626402409pakitafuvajisudawexato.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/45374835293.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48aa847531---serux.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1610e9df78332f---vonotivejekazeda.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a28da85a2---wagafepufoz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e755dd5b13---86313441447.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/fogutesefuxevafotujago.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/menimirasonigupe.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6029281f52---zebukuwonofu.pdfIn PDF document text
    • https://people11people.gr/uploads/File/kozakepikub.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/45936738399.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/0rpg5qfsk5gjdaqh1nm7gqussd/zedopudozokeb.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/tuzomowep.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a51d807b36---sepelatelogota.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/96332880605.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/fowatilugoxet.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/34472770321.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/febubelati.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/69149948433.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/nozojomosilane.pdfIn PDF document text
    • http://katachizu.com/img/news/files/muxonubozuwepukawabul.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/23893691498.pdfIn PDF document text
    • 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_off00010f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001277a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277A 10820 bytes
SHA-256: e050842e4bb52c15a26866dbb6322daa2155f9a8ef15109ec9218dfe74bec0af
font_02_sfnt_off00014036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14036 17404 bytes
SHA-256: 2f8b021b9ce31d2a26cdbe972046adfb36fb713cdc2344999d80953e089fe5d4