PDF malware analysis — malicious · 78ccfb42f1ffa959

MALICIOUS

PDF

71.8 KB Created: 2021-09-04 23:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: ed52d7c2d89df18873ac07c751816822 SHA-1: 9ce1cab387a3932dbad5cde42fc0b3ac088f7b00 SHA-256: 78ccfb42f1ffa959e2b837a8f17a20913d14bdbc533ac729b1875cb3457a18bf

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 file contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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://wastran.ru/uplcv?utm_term=how+to+add+header+and+footer+in+jspdf PDF link annotation
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7ee74b2f8---nebobujejoromebutunawi.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4fe36c1f---62575937453.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160aafd4277396---77023727457.pdfIn PDF document text
- https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7bef733ac0f446050d7de3037d603c79/66373305232.pdfIn PDF document text
- http://beijingbeat.com/contents//files/75981402840.pdfIn PDF document text
- http://safiorida.dk/operatori/userfiles/file/35398134328.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd69071e5---jutapugopekatojera.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/76825577403.pdfIn PDF document text
- http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/700221f5eb6d2d839dd07fc1bb327df3/23092859017.pdfIn PDF document text
- https://mobiligennari.com/userfiles/file/38927741067.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837eec12ce1---gatizobuzelopevomotafo.pdfIn PDF document text
- http://trungnguyenjsc.vn/uploads/image/files/37868198709.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/b2a96a6cb073bfdb429a9594a94d26ee/poxitupomitaj.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be46943fb2a---xopusugazaguve.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d8cead444319fea6b2e5f3bbfd150f84/tegipu.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607162478427c---maxivewotusobojexorakunok.pdfIn PDF document text
- http://cn-junsheng.com/upload/file///20218291516017.pdfIn PDF document text
- http://web-news.eu/www/pkpar/userfiles/file/15404119194.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f0e437f1---lezupogadunesokali.pdfIn PDF document text
- http://bularz-auto.pl/images/userfiles/file/91546899391.pdfIn PDF document text
- https://laserbeautymachine.net/d/files/dojewipidet.pdfIn PDF document text
- https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/4718c357a5dd6e73e9684c0996ff887b/bobinujezej.pdfIn PDF document text
- http://lungshingcentre.com/userfiles/81559593295.pdfIn PDF document text
- https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/3b0cc42e2620142f5badb111ec99dce1/93382995973.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed431d9514---4075658961.pdfIn PDF document text
- http://abwingsjanaf.com/uploads/files/kilepobinu.pdfIn PDF document text
- 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_off0000b818.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB818	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d02f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD02F	10756 bytes
SHA-256: `2d740d5dffd0603274c022b09efdb0662b415e2fea7dc60fd7a655b461ec1189`
`font_02_sfnt_off0000e8ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8CE	15628 bytes
SHA-256: `b8dabfb718e467ff3cbbe93149bf8e6c2d62c5c31199eb4ac439bc7025fba636`

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