PDF malware analysis — malicious · 1ea30092f3606860

MALICIOUS

PDF

94.9 KB Created: 2021-09-05 19:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 37eefe3742b211cfb18d0eb486027892 SHA-1: 8e6241ac390fbeebca25f562e57a175c160acdbd SHA-256: 1ea30092f36068608fda3fb84de6843570484e25b6273bcbcfcdaf0edd28f20b

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download secondary payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://abwingsjanaf.com/uploads/files/damazedebidekiwebata.pdf In PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f0975a3ad20---5188603538.pdfIn PDF document text
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/1990231936ad9c123ebd2e78a83ddfe9/59161458964.pdfIn PDF document text
- https://ehlibeytalimleri.com/resimler/files/melaliviliv.pdfIn PDF document text
- http://carefirstyoungatheartgala.com/clients/b/bc/bc61c41cf33a111e4089ebab1e34a2ce/File/74980531304.pdfIn PDF document text
- https://aparcaderoshaddaichile.cl/uploads/images/files/tumegovajaxe.pdfIn PDF document text
- https://fishboat.hr/files/tisajokatisorodixileriwa.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac312818c86---61739011923.pdfIn PDF document text
- http://ccspatti.org/userfiles/file/14091991115.pdfIn PDF document text
- https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4fb118bf1---fojojabulevirolo.pdfIn PDF document text
- https://wsbtitan.com/images/file/7890922229.pdfIn PDF document text
- https://rosedreamholidayhomes.com/ckfinder/userfiles/files/lomewomit.pdfIn PDF document text
- http://clinical-pain.com/pds/userfiles/files/raromowajake.pdfIn PDF document text
- http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/7l29i2b5b8odgjlahv27isgcj0/nusabixe.pdfIn PDF document text
- http://zonweringnederland.com/ckfinder/userfiles/files/xalijozeke.pdfIn PDF document text
- http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/58787836260.pdfIn PDF document text
- http://oresteruggiero.com/userfiles/files/tanetit.pdfIn PDF document text
- https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/10672786473.pdfIn PDF document text
- http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fejuzojazavikoxamukabemod.pdfIn PDF document text
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6dc126cbf38936766fd6243bf8a8810c/91180352095.pdfIn PDF document text
- http://jljemc.com/upload/files/sonuladalo.pdfIn PDF document text
- http://sparan-art.ru/ckfinder/userfiles/files/fegonudimiloziw.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/22283512132.pdfIn PDF document text
- https://lwim-ouargla.dz/ar/files/78554296910.pdfIn PDF document text
- http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/gupugusujujugeje.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=countable+uncountable+noun+exercise+pdfPDF 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_off000109fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109FB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012212.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12212	10984 bytes
SHA-256: `3404e5c9d629e5448c3b2964663fddc7661d7e23e758776ab1c83646d3f6c071`
`font_02_sfnt_off00013b8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B8D	19388 bytes
SHA-256: `dd6686838337fe3e2e6fcc417a4283242cb69fdd60b528e571abc509ba786560`

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