PDF malware analysis — malicious · 6b741e324de87208

MALICIOUS

PDF

91.6 KB Created: 2021-07-14 03:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 2c6d782ac020d13bc177a384a1e2be51 SHA-1: 4f5b9d5d274369fd84cc93e6a2444191ba9a890b SHA-256: 6b741e324de8720898d54daa15f3e8ed742865b468b0ca2cc29e017df8820f57

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 ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, many of which are hosted on compromised WordPress installations. This suggests a phishing or malware distribution campaign, where users are lured to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://cructi.ru/uplcv?utm_term=eight+golden+rules+of+interface+design PDF link annotation
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/798fbe7d8d73413bd30973c9367d3014/kidiruj.pdfIn PDF document text
- http://geoodwierty.pl/files/file/gufepipebi.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160948c16e222f---54672226811.pdfIn PDF document text
- http://virus-safe-zone.com/ckupload/files/28775376413.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa93d0a10d---49429887090.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/273610ede2865e2ffa588d32effb8d09/84887689188.pdfIn PDF document text
- https://asiajitu.com/contents//files/rakusetuzevomuzawaxutuv.pdfIn PDF document text
- https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16076555661256---44749824145.pdfIn PDF document text
- http://dhs1959reunion.com/clients/871764/File/tibitotuviji.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076669cb0f5c---4175462542.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2825db92afbe8efc7984346be13edf7b/51023535315.pdfIn PDF document text
- https://dolnoslaskialarmsmogowy.pl/imgturysta/files/nutoboregovunofeneni.pdfIn PDF document text
- http://telmeed.com/web/ckfinder/userfiles/files/13555578864.pdfIn PDF document text
- https://alexandrapanayotou.com/web/images/static/file/fuzubikev.pdfIn PDF document text
- https://seeandhearbetter.ie/img/shop//contents/76250595762.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/hhs6dlu5dvhnkbecrsgclcorbo/gufewopakelijepiwibadov.pdfIn PDF document text
- https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/irc1vhnmqfe5pivcebn70p50su/wonifebobenuj.pdfIn PDF document text
- http://bio86.fr/fichiers/86479549244.pdfIn PDF document text
- http://archgeo-leszno.pl/uploads/userfiles/files/97977406752.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608c10066db5c---79135021594.pdfIn PDF document text
- http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ce41c335---fikuxizenevomose.pdfIn PDF document text
- https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160800583905ca---vufinijonuletorekireben.pdfIn PDF document text
- https://daulte.ch/ckfinder/userfiles/files/sagowinas.pdfIn PDF document text
- https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/uh6dgd3n8kejnuskvko9qiqu67/tibor.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f24246cf8---zisorewafozagilaxefi.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/p9pik4m0nk1mk1va502sg297t0/39171472021.pdfIn PDF document text
- http://antifftech.com/uploadfile/file///2021060112591738.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_off00010035.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10035	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001184c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1184C	10840 bytes
SHA-256: `fbcbaca18b1773fdeebbd5dd7ac5a6f3747060015bfafe172be1bcc3ca8f41c2`
`font_02_sfnt_off000130fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130FC	17472 bytes
SHA-256: `78c13e1d2c6100aef96b4b2177ccec7328c3739ad0f8a79defab5d6ba7abdc82`

Open this report in the interactive analyzer, or submit your own file for analysis.