PDF malware analysis — malicious · a73e566f06ca0e8f

MALICIOUS

PDF

114.6 KB Created: 2021-08-10 14:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 6a992356398dd7656d81ac73f4021bb2 SHA-1: 9ce78cfdcd5d70f4d528129058ae10752eba7d17 SHA-256: a73e566f06ca0e8f7d5b00caa96e2ab06e824fa0aff272c2fe43e598415d5700

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9896

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b87d4ea70---14931524653.pdf In PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/47sif40uau0j0bdoce31er2538/ratabujaviwuvokigigafine.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/075670e6fe602a92b355c7574f0f0ebe/misowinupofugugaxuwarifed.pdfIn PDF document text
- http://kingbikeonline.com/images/upload/File/76654236723.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/e66674954a2cb40373f89f00c0d6dfd6/sivaninesudozetixud.pdfIn PDF document text
- http://vodnik48.ru/content/file/74052448456.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b185409f8---kidal.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f761702a4b0---konowowabufi.pdfIn PDF document text
- https://xn--z4qq44i.tw/upload/actfiles/robenaxafizebofamolunevog.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607378a10bc9f---bojuvutepuwarobelexot.pdfIn PDF document text
- http://vitanova-cattery.com/upload/file/sumedebezosi.pdfIn PDF document text
- https://qqhanoman.com/contents//files/1755682777.pdfIn PDF document text
- http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/611628a3c9c2eecba9b352af4396df9f/3415095335.pdfIn PDF document text
- http://dentherapia.hu/files/file/72689937582.pdfIn PDF document text
- https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/8f951a55b107a9c4438f3b8f945a8782/30744582047.pdfIn PDF document text
- https://atlastoursntravels.com/userfiles/file/66566589680.pdfIn PDF document text
- https://fid-data.fr/app/webroot/uploaderfiles/badam.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb4d72c14e---26384064193.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd97736f94---fugubenalaralimapi.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c05a358ad14---pelaruzarutofobofufu.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103626ad82a9---2885544984.pdfIn PDF document text
- http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/75910250069.pdfIn PDF document text
- https://ceccargiurgiu.ro/userfiles/file/74681338004.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d12b381768f1fb3fa1ea167f208df1f4/42435752591.pdfIn PDF document text
- http://onfireinteriors.com/userfiles/lufowufo.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ac88462fa---rufovopokuw.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=diferencia+entre+plantas+alogamas+y+autogamasPDF 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_off0001596f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1596F	18800 bytes
SHA-256: `f6c8f1e93d877b6b215679bbd191c804fc515933326d35fd69af5bf136f616f8`
`font_01_sfnt_off000187e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x187E1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00019ff8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19FF8	11036 bytes
SHA-256: `dbb9d280d2fbbf94c62b9f79d1af9943a3e74834916844a7b39063fdbc97a757`

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