PDF malware analysis — malicious · a155ae28819132ba

MALICIOUS

PDF

67.3 KB Created: 2021-09-27 09:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 837ab170c749f866d43a4ba984a76f11 SHA-1: 598a2c97baf472227fd1898e3f68834e02212efc SHA-256: a155ae28819132ba2352dd47f472f6e50e84e7130eb43ea2fbb6ca387caa1d78

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and heuristic firings indicate this is a phishing or malicious content delivery mechanism. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware downloads.

Machine Learning

Nyx PDF Classifier suspicious score 0.4631

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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+connect+phone+to+laptop+without+unlocking PDF link annotation
- http://henca.com/files/details/file/39149838788.pdfIn PDF document text
- http://anhuicrew.com/upload_fck/file/2021-9-1/20210901093427448730.pdfIn PDF document text
- http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/bogufesivuxariwelutego.pdfIn PDF document text
- http://zhongjiukeji.com/upload_fck/file/2021-9-3/20210903103209744064.pdfIn PDF document text
- http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/bakivaso.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614330b62a295---balilawaxibofegetaliwok.pdfIn PDF document text
- https://kompaspt1.com/contents/files/95896758484.pdfIn PDF document text
- https://floridagreatescape.com/media/file/vivojejaforesezawuj.pdfIn PDF document text
- http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/wibaroxeranolo.pdfIn PDF document text
- http://mutamobilya.com/images_upload/files/17546292460.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614293973c17a---61507390837.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161456a784ebe2---wipakugosemabokidabi.pdfIn PDF document text
- http://brava-ekb.ru/userfiles/file/xumelirozelu.pdfIn PDF document text
- http://baheth24aqari.com/ckfinder/userfiles/files/47070801428.pdfIn PDF document text
- https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/geremelivubulorodilujosit.pdfIn PDF document text
- https://democv.associasuite.com/imagenes/contenidos/files/kawos.pdfIn PDF document text
- https://hotellemaritime.com/hotel/upload/files/pemusinuzopikatusizova.pdfIn PDF document text
- http://dayou.tw/uploadpic/files/202109021722475062.pdfIn PDF document text
- http://mnwebdesign.dk/userfiles/file/bekajoronetiron.pdfIn PDF document text
- https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150cb2f22c61---81614585257.pdfIn PDF document text
- https://interativacorretora.com/fotosempresa/files/tedodid.pdfIn PDF document text
- https://legyenegyjonapod.hu/userfiles/files/dedel.pdfIn 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_off0000af0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF0C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c723.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC723	10652 bytes
SHA-256: `709a891eed3f455b4347550bc899c140d6ba2b615ce6654c0ca21ea169bdb9e3`
`font_02_sfnt_off0000df70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF70	16504 bytes
SHA-256: `0932332f2baa34b625a7deb22160b09a5693d63bfc9cff8b06d79229f1ddb699`

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