PDF malware analysis — malicious · 8cccbfe228195556

MALICIOUS

PDF

92.1 KB Created: 2021-07-01 22:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 7353f74be1148f71d662e1261739bf53 SHA-1: 88da19733b2a8473d8b930136d71ee2296dd7de8 SHA-256: 8cccbfe228195556dccd4ffc38b15bdd85bf6bdd7df926f8fa4486739e984d1c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/3325scjlq4omab85gvv5ghj1s7/rosesuz.pdf In PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/8pavivgd8hl2231d8t1u7s6v5h/7924097284.pdfIn PDF document text
- http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/wadarovij.pdfIn PDF document text
- http://studiotecnicoarduini.eu/userfiles/files/fotopeleg.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/8sfubcr43lo62bd37djb87v1gm/58335295914.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/5abbb13c85b8f6abae13f7201bfb4d72/barezegoxaziw.pdfIn PDF document text
- http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087238074b6d---nojux.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a73723bf360fc07faf51bea049e9fa8b/siwoputikovenino.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/314e7c4fd12eb0a80617a0c22911b7a2/jufenaxinagesiwuzu.pdfIn PDF document text
- http://diclenakliyat.com/userfiles/file/3875345258.pdfIn PDF document text
- http://canvangdientu.com/images/file/gofuzodesukulasodipiwex.pdfIn PDF document text
- http://amon-syotengai.com/userfiles/file/rijaxuvavunekidomoze.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/qsj32ap5885cdh8me31urn18e2/wojukimow.pdfIn PDF document text
- https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/030db10644731c616ca5c4560d7a1945/5041157508.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa19d983ab---36186439364.pdfIn PDF document text
- http://fantalife.nl/userfiles/file/44398403468.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b092c6935a---likosura.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b737d0b73---likupukijadowaz.pdfIn PDF document text
- https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f8f921c7e---56100090916.pdfIn PDF document text
- https://emprenderem.cl/files/julapefibero.pdfIn PDF document text
- http://sieuthibongda.net/ckfinder/userfiles/files/xakerimemebubevofowurir.pdfIn PDF document text
- http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/qviglf1vbaje6sgplp24s0f593/lezikagupumawonupetadik.pdfIn PDF document text
- https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23d608a50---9212541793.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=is+dried+mango+good+for+youPDF 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_off0001047c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1047C	10720 bytes
SHA-256: `b658be9d7e54c0a718f21239f64273e4aab07f4bb4c30bba169907776a353437`
`font_01_sfnt_off00011ce6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CE6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000134f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134F8	17896 bytes
SHA-256: `8493475a7ff215f8cf8b89999a6e47e712a13b60febf68e85f2f4dbf20f1cc88`

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