PDF malware analysis — malicious · d0e6b3435efdbf1f

MALICIOUS

PDF

89.2 KB Created: 2021-07-25 09:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 39508e4f61ed1a0eb0e7c37ff9d51464 SHA-1: 2a57c34a6d5072d5a93299d39243e7fcf6de5200 SHA-256: d0e6b3435efdbf1f8953dfc54141aa4c8980a5c739fbf170aa33789568273119

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous URLs pointing to compromised WordPress installations, suggesting it is used to distribute further malicious content or lead users to phishing sites. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/dvvp2lg1rtcrt9p1k4k7nnsg35/pejagimudosufi.pdf In PDF document text
- https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/289c18793c2474a2e964778c53cd51e8/bizedariparivezofatame.pdfIn PDF document text
- https://acgroupenterprise.com/userfiles/file/4226418699.pdfIn PDF document text
- http://mea-travel.pl/userfiles/file/mirosumisilel.pdfIn PDF document text
- http://gyobel.itpublic/file/10532148081.pdfIn PDF document text
- https://secolink.sk/userfiles/file/sutarula.pdfIn PDF document text
- http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/kitumamefuduxitexewusi.pdfIn PDF document text
- https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084543937aef---80875363204.pdfIn PDF document text
- http://kpotplace.com/uploads/files/fabajewakarabamakomolu.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/3f049825119ea8cf7bc7905eedfd09b9/debumedizemi.pdfIn PDF document text
- http://z500.si/files/dixob.pdfIn PDF document text
- http://activesolutionelectric.com/images/file/nisafuni.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64f20d2460---9712681865.pdfIn PDF document text
- http://cnmrobotics.com/files/files/xapowibaper.pdfIn PDF document text
- http://harveyfamily4016.com/clients/5/51/51a16c7d09a65bdad6d3cd8ef7da6b4e/File/rebobi.pdfIn PDF document text
- http://0930actress.com/files/files/3252520534.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074350200b35---xezab.pdfIn PDF document text
- http://newo.ru/files/files/56183355444.pdfIn PDF document text
- http://np-laser.com/upload_fck/file/2021-7-25/20210725094644945186.pdfIn PDF document text
- https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/210q3c9tv3aqkimm2lasragoj1/19745295383.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/8qdi8v0kasljg63oq1v96nq4t7/nobedevubix.pdfIn PDF document text
- http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/49861763417.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/21ecc99e9244c1bce60e0181e926e43e/fupenuzibememipinupuku.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098644b3ae00---22010430992.pdfIn PDF document text
- https://nanyangtextile.com/userfiles/file/vovulekewubapubad.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac377b7b5---zudafivevetutudiganodu.pdfIn PDF document text
- http://hometextiles-consultant.com/ckfinder/userfiles/files/zegap.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=debut+video+capture+6.47+crackPDF 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_off0000f2df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2DF	18828 bytes
SHA-256: `123dc4b81a1268d14378b5ea78796809d5dc7c346b44fe894e87418b0a8d4381`
`font_01_sfnt_off000122ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122ED	10952 bytes
SHA-256: `d5bd017e18607f3487e344d1e1c8dd49dd5f5d6ca06e5695bb83c31a5f2a38e5`
`font_02_sfnt_off00013c5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C5B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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