PDF malware analysis — malicious · b716031903c76738

MALICIOUS

PDF

67.8 KB Created: 2021-10-07 00:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: f8a73e4a427f48b33447dba57738fbea SHA-1: e5c7b5473bf83d66405b0eb6934a9d005cefa3c2 SHA-256: b716031903c76738a8dfb440857a28acaed06edbda6c47565a2f324de976fc2d

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The ML classifier also flagged the PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.5040

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
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://laborke.ru/uplcv?utm_term=what+are+the+f5+and+f6+keys+on+a+mac PDF link annotation
- http://taketty.xyz/js/ckfinder/userfiles/files/lubixiguzuxutiroxafe.pdfIn PDF document text
- http://sherwoodchambergolf.com/ckfinder/userfiles/files/74801097327.pdfIn PDF document text
- http://bsinteriordesigner.com/userfiles/files/rabofejamivarakubi.pdfIn PDF document text
- http://wsmr.us/userfiles/file/68819025443.pdfIn PDF document text
- https://komunalno-vrgorac.hr/files/49606293585.pdfIn PDF document text
- http://ore-processing.ru/d/files/zafejadelebitesedudukemav.pdfIn PDF document text
- http://fructusartis.com/i/File/56930880198.pdfIn PDF document text
- https://aymfly.com/aym_image/files/60947959125.pdfIn PDF document text
- https://gameadvisers.com/js/new/fckeditor/userfiles/file/xivikimifepegem.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136b42a0fe7e---zopemaroridodusu.pdfIn PDF document text
- http://hebammenglueck.de/ckfinder/userfiles/files/46239482129.pdfIn PDF document text
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613282c9ec4fe---33553103379.pdfIn PDF document text
- http://moscowcharm.com/content/xuploadimages/file/11463075662.pdfIn PDF document text
- http://cukiernia.eu/upload/files/tonazokebubivo.pdfIn PDF document text
- https://sharmtocairo.com/userfiles/files/23588186885.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/7c35c56e93396f8c7b4cfb5c03cb45fb/wotipigevosuje.pdfIn PDF document text
- http://es-manzokudou.com/yamituki-n/uploads/files/jevagorigisosefe.pdfIn PDF document text
- http://sp3siemianowice.pl/userFiles/files/sobevedoruza.pdfIn PDF document text
- http://pandoraecza.com/genelresimler/file/72942983152.pdfIn PDF document text
- http://giorgimpianti.com/userfiles/file/66613961170.pdfIn PDF document text
- https://dreamscapes.ca/dream_scapes/userfiles/files/kizifaniwojujubolax.pdfIn PDF document text
- http://ticaproduce.com/ckfinder/userfiles/files/kanatu.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16143f465df049---disigol.pdfIn PDF document text
- https://wroclawmodelshow.pl/ckfinder/userfiles/files/2445356815.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_off0000b831.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB831	15496 bytes
SHA-256: `c3cc2411cffc091219c9bb482fdd9012a5f91fda618d3e15ec190bccf115e4a3`
`font_01_sfnt_off0000dfda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFDA	11104 bytes
SHA-256: `82fc2eff1aae3e01ea9a0f517740a63d13ef0852026fa36a1debe8749c0e6c49`
`font_02_sfnt_off0000f9be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9BE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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