PDF malware analysis — malicious · 1a94a30ceb09784e

MALICIOUS

PDF

86.5 KB Created: 2021-07-05 19:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 302a0517ae699a5bc0f63734fec83935 SHA-1: fb840eb6fe91adacf069299e936c6786974c859b SHA-256: 1a94a30ceb09784e39794139c8d3eaae46f5cfdd4674ba5d40639747c7b9ad46

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a remote-support tool lure. The document's structure suggests it is a link farm, with numerous URLs pointing to potentially compromised WordPress sites, likely intended to host or distribute malicious payloads. The presence of embedded URLs and the overall structure indicate an attempt to trick users into downloading and executing further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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
Remote-support tool lure high SE_REMOTE_SUPPORT_LURE

Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/v0sm78pq7sqo3rbum6c5pku3h7/femukiso.pdf In PDF document text
- http://zentrumok.com/userfile/files/wixadafegan.pdfIn PDF document text
- http://pm-property.pl/userfiles/file/lifubelul.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/2grrudqlsvfv8u13ggr9mjitg1/ravunem.pdfIn PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb48fb2fc1---ribajajuzenuwabenad.pdfIn PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16087343476f21---71997600174.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/676cc243954215834b37d4067081313f/33341552954.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ace38018c4---kujof.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607121c389cd7---31001947148.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f028f759---dugij.pdfIn PDF document text
- https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/51150e03e8af3c9dab328d7319aa8813/17659093442.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f645760f06c7e217336b5680de3278f9/dumomibefoso.pdfIn PDF document text
- http://bestapp4u.com/admin/uploadedfiles/file/zukiboxofobesejatiwof.pdfIn PDF document text
- http://mousike.it/img_ins/files/91208898323.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/556caa6e0e3560107bfff6d4763c2e94/nelofimiwatopepuno.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a831e2c7bec173be71f13871ab6bb4b5/mimukub.pdfIn PDF document text
- https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/a5c5dc88915d79aec94d5fd4f3a12015/39528629718.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160948b6abde4f---golutiloza.pdfIn PDF document text
- https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/41631c00ded645210335b105a1a8e039/sevodejawusibemip.pdfIn PDF document text
- http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b63b47796b8---78081430703.pdfIn PDF document text
- https://celebicatering.com/upload/ckfinder/files/rurejikanu.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16083104878f66---68126588840.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e2db1cb83---3091027769.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12fbdd4f51---10376175719.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/1d8d6ac2b534d5e7d3b5c6fec4349bfa/33487805560.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/2e1b642db39c777a56fec5e092743e6e/18149649122.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=anger+of+stick+5+zombiesPDF 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_off0000ec9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC9C	10880 bytes
SHA-256: `6e5eb6544a1d88baf4aad8370de9d40ed71f9bed569ca7fb27e4c71d5e2c3fee`
`font_01_sfnt_off000105e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011df5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DF5	17840 bytes
SHA-256: `0250439ff8f9772bc78f1d8d1f34c29e73870d60cf749e37ccb0451ee45d26e7`

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