PDF malware analysis — malicious · 61322e53ceda997c

MALICIOUS

PDF

71.3 KB Created: 2021-09-05 20:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 62f8ba81af5f97f088ca4d6ceec57116 SHA-1: 5b1f363ab56f154259dc600edb831663bfe6cdb0 SHA-256: 61322e53ceda997c0cfde561ce5874b0fceed302a8b39f22ae8083aa9b3daf51

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports a malicious intent. The primary attack pattern involves luring users through search result-like links to potentially malicious content or further infection vectors.

Machine Learning

Nyx PDF Classifier malicious score 0.9837

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 https://smidgel.ru/uplcv?utm_term=elementary+linear+algebra+bernard+kolman+9th+edition+pdf PDF link annotation
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54758ff8e---jefemejovep.pdfIn PDF document text
- http://rghsalumni.com/clients/82979/File/kajapawomanagode.pdfIn PDF document text
- https://drisraadentalcenter.com/userfiles/file/19976193370.pdfIn PDF document text
- https://alarouba.com/ckfinder/userfiles/files/luwifu.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2a27e6cbb---1305191955.pdfIn PDF document text
- http://bestbuyfromindia.com/userfiles/file/bajomosutokixisi.pdfIn PDF document text
- https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/37fbf1604153638779362fede0fa592a/sodababinabasedo.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7982660b6c---vewozajozinijadebunagav.pdfIn PDF document text
- https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/28965d26a95b40ee47902da82e6831aa/xifesifavaw.pdfIn PDF document text
- https://paperland.bg/uploads/file/miliviboz.pdfIn PDF document text
- http://urdu-hadith.com/survey/userfiles/files/viloruj.pdfIn PDF document text
- https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/c3a9nsigfrvtg7eo8ep26n6u52/wafotojunixatevofad.pdfIn PDF document text
- http://broadmoor77.com/clients/39738/File/senaraxunavoso.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14b45bc6a---boduxujovakox.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16112ac86ec268---fosejamojajifuxediwewubu.pdfIn PDF document text
- http://lltsg.com/uploadfile/file///2021071911452327.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/mr76fik0gjohgfp0adlgi8a6j6/8401342114.pdfIn PDF document text
- https://karapinarinsaat.net/userfiles/upload/file/bewivapazaramonekud.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f88724144---55455830150.pdfIn PDF document text
- http://yer-krasnodar.ru/ckfinder/userfiles/files/8603099866.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160834e88afb7a---dabexenotupul.pdfIn PDF document text
- http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/80258502692.pdfIn PDF document text
- https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/67490d8489ecfa0bb290cb68f181836a/momasuxutitizivezezunekob.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070146344aba---gumevapeluf.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/03a9dad7c51f1419350acbe5c57ae4c0/184442441.pdfIn PDF document text
- https://noddy.nu/images/file/13024066679.pdfIn PDF document text
- http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/togujobepigavotu.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_off0000b77b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB77B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cf92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF92	11272 bytes
SHA-256: `873ccb232c6537dc074ee0edb8695d62fb146bd96409997b1ba8f54a1c5344a0`
`font_02_sfnt_off0000e95f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE95F	14884 bytes
SHA-256: `b3780cb41559fddb800178eb8a99df314c2bcae26e93989de19153dceb9f8c32`

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