Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4f4a070b7b359f…

MALICIOUS

PDF

83.5 KB Created: 2021-08-22 02:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 43fae3157a815a3d3ac34a4f16f0926c SHA-1: 14ed260f3af82eb286d10d53f690630b17a05caa SHA-256: 9e4f4a070b7b359fe57661962b7b74c6666ecec29a5091641e66c95f200e088a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It contains numerous links to external PDFs hosted on compromised websites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic further support its use in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://oniceh.ru/uplcv?utm_term=se+paga+tenencia+en+el+estado+de+mexico+2020 PDF link annotation
    • http://senseoftourism.dk/userfiles/file/57258778861.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/babileka.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16109627d2165c---61284069285.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/49137639871.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/b7b7326735919fa7c90073aadac9d059/dadipedupiza.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/sukewodebenegedoxisu.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608124f1556fc---sewegusazewokijopepug.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/27725979155.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/7iojn4d9c5imfg5m0dhucf8hd0/11416835932.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/95156796384.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca7da68e38---43572665096.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23885441439.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/56095affa46a07018dfcd81137bf308c/52789462639.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9127c0ee9---lateragubinofibanozu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/jnkgifdprftv3m9fe1ha0ame2t/61211559153.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/84696890018.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/pikun.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/25286367400.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/leleji.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/48966682113.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/98304074372.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/83295794179.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90d2c69d63---sefavijulevexireretug.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/c21267a6e5418897b6749163abb238bb/45023207685.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/fuwopujitak.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_off0000dbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 11176 bytes
SHA-256: 50acec973771f8e2dc939e56cc7364029ad376716190e5efe7131cc7f1b7574c
font_01_sfnt_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E04 19228 bytes
SHA-256: bb1a76d3fb113d8452524137ec4beda91b7de2b4536a09a0c86d064b3ac07b32

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