Malicious PDF — malware analysis report

Static analysis result for SHA-256 7570f3b1ced6d01a…

MALICIOUS

PDF

86.0 KB Created: 2021-06-25 23:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68334f170e3ccfdd5c65fcf805e2ad33 SHA-1: 896fa8522e3d69db8f42da7e47f266b5ddcb9276 SHA-256: 7570f3b1ced6d01a3a98ab8216181b0c7441637be069052dd2e15aabc3c5952a
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9842c18693---84156892911.pdf
    • https://unosms.us/userfiles/file/90356758329.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609220a1eb11c---domidusetawasebenaxan.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/0quc39qajfu34livkjr0p4o341/25346425341.pdf
    • http://bannermaul.com/userData/board/file/36517167503.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/1cc4116318238831b7b6bd5140d348d3/devasexafoniven.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad74a74c17d---govumewij.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6d0cf73b24c605df4dddf2a2a2bb4f39/29567468918.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c42e9bcdd25---26091695500.pdf
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/339fed6a87e8022ddb0e387f4fa59f7d/kafimi.pdf
    • https://hcviet.com/img-phuctri/files/noperibika.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/3a882d8857655202790429508c854e83/zusixuxodopixa.pdf
    • http://aj-logistics.com/stock/userfiles/file/88448164838.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb09863f85---85484002849.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071599e87f82---vepokuvafozodapogifagezo.pdf
    • http://strahovka66.ru/userfiles/file/zeponokovariwatabu.pdf
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/2753918535.pdf
    • https://facade-metal.ch/ckfinder/userfiles/files/42975473298.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a70b3c82d9---83584538936.pdf
    • http://lyzebrno.cz/userfiles/file/saximapoli.pdf
    • https://alakharia.com/public_html/userfiles/file/23614704155.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3835626d798df6a2ca24f5bb91ca437a/83543665301.pdf
    • http://biaikatolikus.hu/files/file/pasaxep.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160769d6ccd51e---96396222125.pdf
    • https://topjobsnepal.com/ckfinder/userfiles/files/56024469270.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce7fe33413---nugazifexidob.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=oath+of+the+storm+paladin+5e
    • 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_off0000ee58.bin
0a411dbc4e252eba440513e81eb2520f9d390fd773f9189831670c401eef09b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 17044 bytes
font_01_sfnt_off00011a28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A28 16792 bytes
font_02_sfnt_off0001323f.bin
5e6d67354016b38ba033cc5712d59525be1e8b4ea38586f8942cbec4e6c7ef78
pdf-font-stream PDF embedded font (sfnt) at offset 0x1323F 10924 bytes