PDF malware analysis — malicious · 1732843a9a497944

MALICIOUS

PDF

84.7 KB Created: 2021-06-28 14:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: d8fd19a72f68744f4d935f521cabbed1 SHA-1: 4ecda4201ee64e451e39c75386495a37d15774bb SHA-256: 1732843a9a497944b8ab6ed03b35f2ce905372326348ee00e0724ddb01a8154c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised CMS upload storage, specifically WordPress sites, which is a common technique for hosting malicious content. The presence of numerous links on disposable hosting further supports a phishing or malware distribution intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/jrcj46sq6s9c3k17ce8qb17262/91543396494.pdf In PDF document text
- https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a49cf9b4f30---90982594211.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9472bc38d---3925058725.pdfIn PDF document text
- http://csc0898.com/userfiles/file/20210610144244_02ogo7.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/rthcj9mjqhdf9j2bmnkr7ql25r/dofofirixudonibutuke.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607acba995411---70328507443.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/0733a466559307d5e16478b44d305351/13836023073.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a158827fad5---79924935236.pdfIn PDF document text
- http://sahamit.net/userfiles/file/25605949261.pdfIn PDF document text
- http://aldara-latinoamerica.com/userfiles/file/12240002901.pdfIn PDF document text
- http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/39227971959.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b347287b4---nomujunibuloka.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16074c525ba42b---fijivevesipisofodube.pdfIn PDF document text
- http://wanyuantemple.tw/userfiles/file/lesepawepo.pdfIn PDF document text
- http://erbaytag.com/resimler/files/jutelegaridav.pdfIn PDF document text
- http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab911a4bfdb---gelejerogomejak.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a15509cced6---xulimudijipotalavazixa.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/74d9e3d8081e80b7f8ee1848567b9226/gapekulamuxiluxav.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfd342d83---girerudelubevibo.pdfIn PDF document text
- https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/mjj54koei9ou4f78m330g9gkq7/zakived.pdfIn PDF document text
- https://alutat.com/data/file/ganefazoxivani.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087ddf5a09f0---jebatike.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/33091e90b236979346908b1e5c4d436e/26117617845.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=mdr1+heartworm+preventionPDF 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_off0000e5d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5D2	10640 bytes
SHA-256: `667625ad41aae06f3d957b49415e50a0860eb822101af565873def27139b91f9`
`font_01_sfnt_off0000fe09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE09	18012 bytes
SHA-256: `3d54cc16293e9599be2f2f3eb14c67425e94e609bb5eb1bae81c4c87e7ed7066`
`font_02_sfnt_off00012d73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D73	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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