PDF malware analysis — malicious · f869dab84ae877a7

MALICIOUS

PDF

164.6 KB Created: 2021-08-25 13:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: f0712957e998aff8528e5ede1540d07b SHA-1: 02025241ab1b73a6efdfafe023fe5701ae659eb0 SHA-256: f869dab84ae877a77af34e368fc9e1547ca1c7201e863e6e7ff8811f2138c5fb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or contains malicious content. The heuristics reveal a link farm structure, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection attempt. No scripts were extracted from this sample, but the presence of multiple external links and the nature of the heuristics point towards a malicious document designed to lead users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8156

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://grandwatergatehotel.com/upfile_hotel/files/1270174191.pdf In PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a238ebe9b43---vuzobibusu.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/49c4817cf1e1810bc0f09cf9a3db9bf0/kutisogobelenidomupa.pdfIn PDF document text
- https://peisheng.org/uploads/ckfiles/files/6120469c52e53.pdfIn PDF document text
- https://tourgardan.com/basefile/tourgardancom/files/jemorixatirelotonurif.pdfIn PDF document text
- http://kaies.cn/upfiles/210809173505089917so0ba0.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1984cda6d---37405401744.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/be6feb79086fad29ca45a07f384e370e/31124473107.pdfIn PDF document text
- https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16097d2c00a5f1---dobawexog.pdfIn PDF document text
- http://odontoflash.eu/userfiles/files/dimegujopusudidisodubenan.pdfIn PDF document text
- http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/xakofokesofoniv.pdfIn PDF document text
- https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b4c9ccd82aa0a1e475212b85d62d95f5/wofusoziviwu.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f1fb4f4df---jewazenam.pdfIn PDF document text
- http://market-oborudovanie.ru/upload/file/11609771124.pdfIn PDF document text
- https://afayl.com/userfiles/file/xekazelaxaxudusafipabenug.pdfIn PDF document text
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123577680c1a---85615937209.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/21uuivscvtc81plnrtvo56s9v6/pepozedamivefa.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/cdd391212841ac4a2b02b231d590aa78/21539724269.pdfIn PDF document text
- https://webtechnocrats.com/upload/file/zunewiburuxibone.pdfIn PDF document text
- http://hnspkjx.com/d/files/gopizonididu.pdfIn PDF document text
- http://www.sudaff.com/pics/file/4417603256.pdfIn PDF document text
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ck4ivskk13u3rkbrhael1rrnm6/9231123315.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac0da5eedb---12431923526.pdfIn PDF document text
- http://enslev-anlaegsservice.dk/userfiles/file/93763404980.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/5c99e74b4d2ec75189b1b3b17b7e014a/tizalubosanipabusodoguve.pdfIn PDF document text
- http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eb31eb92b---gesuvelimon.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=agglutination+meaning+in+englishPDF 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_off00021806.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x21806	22448 bytes
SHA-256: `808b24982c9ea989761af2a1644db575ef43f3c4cdaaaefbdc0178f4517e3ee1`
`font_01_sfnt_off00025133.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x25133	10536 bytes
SHA-256: `94720bc94af1533ae0e8ba12f9036f3f1854736ce418cd67659b7ec6e04e2bd1`
`font_02_sfnt_off0002690c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2690C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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