PDF malware analysis — malicious · 569ffc2e4b81bd65

MALICIOUS

PDF

91.2 KB Created: 2021-09-05 22:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 210f41b638cc660601a025b50b4a0d6a SHA-1: 77aba2f58e480078fb7ebc7c5b4b53e7de4ed237 SHA-256: 569ffc2e4b81bd65392db5b1890dfcf8bb7c488269708a4ef93220f5d82b7333

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://sportsclinicwest.ie/media/contents/file/pikenizefog.pdf In PDF document text
- http://centrumbiznesurawicz.pl/userfiles/file/30091540275.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/63d409e7a8fecf7b8e4790d49a5f59db/5536413936.pdfIn PDF document text
- https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/negixixiwitajuxuj.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/9e187f65ca633967a8e7d626d0785634/webamilejiwovorezup.pdfIn PDF document text
- http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/66476768418.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b98f98a070---jelozejagezap.pdfIn PDF document text
- https://sardavetri.it/userfiles/file/68907622762.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e1374132c---51665501805.pdfIn PDF document text
- https://alnahamgroup.com/userfiles/file/6839201778.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/8147ae7fd4912152901ea1e7205bd15d/galugi.pdfIn PDF document text
- http://rezidencianestor.sk/app/webroot/files/ckeditor/files/gozapopofobokotakifege.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/3086dd9f26991964058e4c9db83016aa/36192692159.pdfIn PDF document text
- https://lesartsdansmonjardin.com/userfiles/file/20210728085002.pdfIn PDF document text
- http://avtrak.ru/ckfinder/userfiles/files/40415221910.pdfIn PDF document text
- http://ricarda-allegra.de/userfiles/file/nujuzekusakexaz.pdfIn PDF document text
- http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/kamirosatisowab.pdfIn PDF document text
- http://szyldkj.com/luodan/images/userfiles/file/66787282956.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac1cd6dca9---takuvuzim.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/2b795005b471a33d44189a67c44d1184/wabudixuzotogizulixobafe.pdfIn PDF document text
- http://www.kammerpop.de/files/file/nadopapemaxigilidemik.pdfIn PDF document text
- http://nuovojob.com/userfiles/files/8878409932.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=dr+khandaker+abdullah+jahangir+books+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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off00012edf.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x12EDF	16668 bytes
SHA-256: `6d08800b0736f2391037722e4c6772258e41b8ca8d20cac51f83e6a764eb07f7`
`font_00_sfnt_off0000e14c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE14C	19812 bytes
SHA-256: `6728472b38d2a49e0ec8752f141639370347ed186a4c977421d4ac4f71bc7b14`
`font_01_sfnt_off00011579.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11579	11144 bytes
SHA-256: `cdd5225198aec43758fec6405be8e03c95a389a84e02da5d0522f82203ddb538`
`font_03_sfnt_off0001462d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1462D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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