Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ede94e6a9c2e617…

MALICIOUS

PDF

84.0 KB Created: 2021-09-01 05:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d7ccf685529761274d1892c11adbff33 SHA-1: 60b49a9ca5158240693ccec4247ba2ce034ae63b SHA-256: 9ede94e6a9c2e617e1d4a7766c17d7f58aa7dc7c62dddfd9ff1157393aedd3b1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://tekstilkentrehber.com/upload/ckfinder/files/niviwuwomomubi.pdf In PDF document text
    • http://amongelite.com/ci/userfiles/files/4941996973.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/zuvajuvimola.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/91387137343.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/dasotorika.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/wesujitab.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ho74vmnmntq7k0969unu6jau47/70149969713.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/rizazivumodase.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3a8a6344a---31220993933.pdfIn PDF document text
    • https://bamor.org/userfiles/file/34826562388.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/28b0qb714nld7m9jmqgravfdmn/kovikok.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e6e4417de---35095198664.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7c5f9e4e3---kateriz.pdfPDF link annotation
    • http://nano-vip.com/ckfinder/userfiles/files/goxidokuxobegukedowimodo.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/dosilamidolat.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/mopixililojekirixazap.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/9eaa20d5f111cc97ac98bbb97a6bf67c.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9e989af80fd0fac60f51aa3942219d8c/25873444673.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/69346347379.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087f72229538---92449044270.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/52310470715.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609165ea865bd---83769860261.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/zelugonutoreri.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/radawatod.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610bd4c44b2aa---94228050034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=acetaminophen+and+morphinePDF 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_off0000e513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE513 17204 bytes
SHA-256: c7eaeeee761caaf5638abe85364a7ee52745472f6343f53da9c6d062b140a37c
font_01_sfnt_off00011162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11162 10544 bytes
SHA-256: eb506213526468ef122a5eb0d68bf1cf92569c823c45a8368dbb091da83409e5
font_02_sfnt_off0001292e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1