PDF malware analysis — malicious · fb742999a0be8b85

MALICIOUS

PDF

92.4 KB Created: 2021-07-17 23:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: bf207a7dfcd6cc565bccb242c8d64885 SHA-1: 6e85714241902e60a708f7184a31d484b2ad2768 SHA-256: fb742999a0be8b85023b31a618d0db469b9da214c0deac28b7201d39dbbb8e2d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://aftckwt.com/uploads/file/71655447271.pdf In PDF document text
- http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/0jm01o7cn3nff8t4q92gno5hf0/42475788210.pdfIn PDF document text
- http://rymwid-training.com/userfiles/file/50708361673.pdfIn PDF document text
- http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/87507322389.pdfIn PDF document text
- https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4edd3852---35248919755.pdfIn PDF document text
- http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/dd690a8154f1b8f4c449bbb8fca5e42a/74361524223.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd4425342---26684525593.pdfIn PDF document text
- https://ajwatravel.com/wheelmarine/userfiles/file/62241042453.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/2d0c326a68fa5e8477812e9e4041d4bd/dasigodunutug.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf8ab3bc7---95447119863.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ldjukdsco1bcq7cmflfeoa7vn6/91878664099.pdfIn PDF document text
- http://svsteinfurth.de/radsportfiles/file/pavobutizod.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/232878412c222b4a5e04b8d43082d581/82111165243.pdfIn PDF document text
- http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/71431763782.pdfIn PDF document text
- http://creative-format.com/upload/editor/files/gubowoxifagolu.pdfIn PDF document text
- http://funperm.ru/content/file/zafurerejezaselifukusoju.pdfIn PDF document text
- http://allasclub.com/campannas/file/ruxotidemagafomudoma.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09e7c42d6---rujibopozaxakibejuve.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160894eb106c9d---82498373050.pdfIn PDF document text
- http://mosvag.ru/img/lib/file/66478777677.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d30ede266e---velediwolubagamoxozis.pdfIn PDF document text
- http://stevis.cz/files/file/wegas.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/5bd6ebf6e26a83461f97284706dda892/fuguzusu.pdfIn PDF document text
- https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/e75ca46fd80d0e7af312dfecb7fe76e2/vuruluketutazelarajow.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097775ccdf0f---malomijugowapiremiwomilex.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/77a39nlfhicgop02rg3rn0l7eq/xubida.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=pisces+man+todayPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off00010796.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10796	16696 bytes
SHA-256: `91c73bdcc4c718c2e7503f74874d7e767bea0f17f9a9e9dabdc55be83135ed47`
`font_01_sfnt_off000132f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132F1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014b08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B08	10500 bytes
SHA-256: `90cf3d10b48e59b5830beced5d6a442e4fda85c957b69ab0d50181cc1d534e75`

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