PDF malware analysis — malicious · 6b3a795730771b5e

MALICIOUS

PDF

89.7 KB Created: 2021-07-05 07:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 93c7039bd089ba40606a543e5082ccf7 SHA-1: 56800ac9aeff73b4d60d65cb660155f423797eb1 SHA-256: 6b3a795730771b5e70da0aa45dfd316f7ff8f6910c39313052079b7e16b1b02b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection score strongly suggest a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=aladdin+a+thousand+and+one+nights PDF link annotation
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3d60bfe89fad3a7d58507b1413ddedf7/74313099462.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/lt7nppmda6f01jeigge5ld7du5/lotudoj.pdfIn PDF document text
- https://topclassgreenery.nl/images/file/zidixufolarunenaf.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b6c6921a---pelanavojomuzok.pdfIn PDF document text
- http://namngonviet.com/user-/files/tavuriladazaxolarezovadam.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/7f2750049c16c0875ea009d5b3cb5655/78818769892.pdfIn PDF document text
- https://zegabilisim.com/calisma2/files/uploads/wiwurebis.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/9100bed886589d2b6cda42a56efe3ad4/66886988947.pdfIn PDF document text
- http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/dejenagasis.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3113d744eb---66166547010.pdfIn PDF document text
- https://cncostruzioni.com/userfiles/file/sekapewopebewisibe.pdfIn PDF document text
- http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0ec5cf31428d6a75b6875c730b434f1d/6626847203.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/omosb4tv1tga4tqlrfacdcdop8/58331282096.pdfIn PDF document text
- https://digireg.es/upload/dunonumawatugudorito.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3177dd7165---saxiduxujekipexawosajol.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b2aac521a---lobidisunodetazesobusip.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/87ed9adb8f20d714d9e766f424ad61d6/dageza.pdfIn PDF document text
- http://safeabortionnepal.com/userfiles/file/rigegiji.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4c864fbc45f762b809e582e455155ea2/falela.pdfIn PDF document text
- https://semut73.com/contents//files/jovovazof.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a48c530599---33991308210.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160af6788cb021---26712293882.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bacb7a7a1---42673114388.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eed979a8a0---7075150114.pdfIn PDF document text
- 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_off0000fc9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC9C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000114ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114AE	17408 bytes
SHA-256: `e71fe7b7a852a69eb7b1bb31c3a26c49cb395db10d9e32b65a3b867e265afe55`
`font_02_sfnt_off000141f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141F3	10508 bytes
SHA-256: `b656ab00b0b8079389128fd22fdebd2dd4fdc6847dd98d07f9b2715309cef6a2`

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