Malicious PDF — malware analysis report

Static analysis result for SHA-256 e534ff8f46cfafdb…

MALICIOUS

PDF

88.7 KB Created: 2021-06-29 01:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47c71909ce3cb046560c436fde8b51a6 SHA-1: 484996c15efd7d4b560f22789b8baf7c413e44ae SHA-256: e534ff8f46cfafdb8ffa4ce1780c360d6b8a048e5bff2a1ef7a02e2498425527
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely serving as a lure to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://garglob.ru/uplcv?utm_term=income+based+apartments+norfolk+va
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2e2911540---71379032973.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f296f39c0e---13090419403.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096594a8df8a---13173506002.pdf
    • http://fszhenjia.com/upfolder/e/files/20210527072828.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58b3ad6f5f---somufidutirigojaluwanakov.pdf
    • http://baigeleather.com/userfiles/file/39853025598.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/d92nm4sv4oqkrbf0mdc6vt5l4p/sesexuxulolifuzanomel.pdf
    • http://tuanayapim.com/rsm/files/58392098070.pdf
    • https://kurek-rowery.pl/user_pict/file/2383911173.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/k62jfijb9ifamnqch6j1h9gkm5/87874698642.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/0a27ee6627a92cc486e347e5d86d0c07/77109594553.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acd634d2b1---56574716131.pdf
    • http://bscartridge.com/pic/fofijezunikodesik.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/jpe4se14gd7vpmfofrh08qggi3/57867442802.pdf
    • http://yummyschool.com/_UploadFile/Images/file/zijazusuj.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d656abd5d---zugosati.pdf
    • http://verkaufs-akademie.com/userfiles/file/77215480176.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788b5c1b9ca---rawaropogelasixixis.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21bcaa7061---4634598646.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/3cea995249f9352639a6e05a8c5bc639/50813667243.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/0329c9d447cc0d4c3c2a2ee2a6049981/48623369990.pdf
    • http://ferrogep99.hu/static/media/file/kozexogobe.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081646885860---donurelexikelad.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160845e00f26fc---59414580363.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/b5ae2777f61d3edca9f9dee083043aa6/90110453739.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160908876675b5---zisamazonolaba.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_off0000f434.bin
13c2f8890b6821b3974b0e2f8cc405e657ced536d2eeeb2b9a3c1d5fdfff17a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF434 17856 bytes
font_01_sfnt_off00012253.bin
713fee38bbf0c56cbb1dee710d2fbff2a8adbc52af0978d01126a60db57a51bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x12253 10936 bytes
font_02_sfnt_off00013b7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7D 16792 bytes