PDF malware analysis — malicious · 78d3ade9a1c19d99

MALICIOUS

PDF

85.5 KB Created: 2021-07-14 08:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: e011dca6a7bd0e58422676d1230e7a20 SHA-1: ee74125b5971460b2c3c6aee61e6ef3ead2b0303 SHA-256: 78d3ade9a1c19d997e6d460a04d6baddfb616a7c9db0edf1b3bf84813023b068

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains a link farm pointing to numerous compromised websites, likely serving as a distribution point for malicious content or phishing attempts. The presence of multiple URLs hosted on compromised CMS platforms suggests a coordinated effort to distribute malware or facilitate phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://aryajob.com/user_upload/file/jurobaganafawebetosunu.pdf In PDF document text
- https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db5456ab50c---pilevokaxenerovigala.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/be993c30743b62aa760d61eea10523a7/xaxexanexaman.pdfIn PDF document text
- http://yule-sign.com/upload/editor/file/20210529235132.pdfIn PDF document text
- http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec5399893---27270736934.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4c38afbae7837541e4bca97ff2bb13e3/buvisezoxuluwabulu.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1d98de0e---jutazokaxekaketu.pdfIn PDF document text
- http://tfforming.ru/d/files/86570432576.pdfIn PDF document text
- http://alpha-cp.com/userfiles/file/kawesolelorunegizomaxawi.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28f5c4d6a5---84996020015.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04fa1270d3---88198630804.pdfIn PDF document text
- http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/pavajulag.pdfIn PDF document text
- http://gaziogluenerji.com/images_upload/files/64073872833.pdfIn PDF document text
- https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/3mli1ufopqfnu8qrcev4tn2jut/sofixuzojaso.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/55b84ed77767b4692eadcdac5557ff1e/30957886878.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hplgfh0nse431h8hbjmufemf45/vasuzowosajibozewemutet.pdfIn PDF document text
- https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/85f1b2768497ac9a91b57256ce650422/fogedoxeba.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/welovupebizegepot.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6050865634---72281612571.pdfIn PDF document text
- http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24f17b5e3c---81727472262.pdfIn PDF document text
- http://mtsskzy.com/userfiles/file/simuburufojo.pdfIn PDF document text
- http://aimic.com/userfiles/file/3733626978.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/0nqsg4knq7v7bp7jfmg9mbcgai/safawezoferisivan.pdfIn PDF document text
- http://yossy.biz/userfiles/file/36459425285.pdfIn PDF document text
- https://beatmuellerfoto.ch/userfiles/files/falomurexemokogoxewi.pdfIn PDF document text
- https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/f9qmoomubslae1162kbto6p9c7/71555959681.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=combine+data+from+multiple+worksheets+excelPDF 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_off0000ea73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA73	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010285.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10285	16616 bytes
SHA-256: `db2bfde7aee6e508238aaddf92ce50d8c930bd92f83c2dbda19a7d5a50112295`
`font_02_sfnt_off00012dd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DD6	11436 bytes
SHA-256: `e5eb2ca9cb8adbbe75091e2fb1447ae58e9d90e8d20345eb2fd12038a2b4d757`

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