Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dd9b6771b3c8f0…

MALICIOUS

PDF

74.0 KB Created: 2021-09-01 08:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e4f8332744d0b80b3db9dba0b71f6ba5 SHA-1: 7b3e3049a0d18d9c56d4187fb472acf7a32aab12 SHA-256: 48dd9b6771b3c8f04bb24524d3ee7bfb537005e4fe19df18f064492aed8f4d1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to numerous domains, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of multiple external URIs and a link farm heuristic supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://shepardfarm.com/clients/877021/File/44106153219.pdf In PDF document text
    • http://nwatchonline.org/userfiles/file/xuwelopokejoxolozelotuza.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/zegezebesikapelip.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210817_192421.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/radopi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f763e442f02672ad60d7381cf3f1a57d/289630440.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/e828ffa04a6d981f10833a936bb2434c/kujimaxojijazo.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/b5796cbd26a7c1057a21345585566817/ludakuwurefik.pdfIn PDF document text
    • http://samsung-service-center.ru/uploads/files/88716133593.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/vidixebenapuxigefegikare.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/uliiqaumj9t10pb07ggouinep5/23542722199.pdfIn PDF document text
    • https://mediaskills.rs/files/78231569176.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a16878ef3e1---rolusebejuxiluvemesak.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210812065517_1662512798.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/301pc79vnl1tvf3b8f1sn386j7/30718733030.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fa799e734---munulirosazodasupop.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0e96cb8d05c1fddbafda2c3f4b5d914a/lisexuramovidufasowe.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744c5b7dd2b---zixolofogol.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/xaxiboruf.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/89923728890.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/085ecdc45e2721b22da12521c595499e/towutexob.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/2905644756.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=marcel+proust+timePDF 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://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_off0000be95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE95 10524 bytes
SHA-256: 55c14deb05c8d4e5dc9f26b6cbaa73484a9d92626c7dca5aa45044a65c5c3c0b
font_01_sfnt_off0000d699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 16724 bytes
SHA-256: 175741269c6746ee7f109b8e87e6d1539d21a2f9012ad7d8ab33d698e0cfe655

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