Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8ed38a0a2022f3…

MALICIOUS

PDF

91.5 KB Created: 2021-07-30 18:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4b9f32b1d089b0215fbb61c5747d0390 SHA-1: b19cc77c57195f2d01daf40b5944a5be9b2c6ac3 SHA-256: db8ed38a0a2022f3d5240fa14b4ae7748e3a1c80d584377b92b425df669ddcea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of links, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9158

Heuristics 5

  • 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
  • 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://cochleartudaskozpont.hu/files/nunakimadozajivu.pdf In PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/bumewan.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/ihplirq7sromc66i3053j3hcpj/nujadewofuriwepa.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/98aac17f4aba98e307c80fdd342ab9e0/tujeniwajol.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a87c902e969f6a3e93e9dde25bce3c93/botatalubawojujijule.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/bbc3d24a6768b2cce8f0fe2d0be48571/jizib.pdfIn PDF document text
    • https://hirurgija.me//files/51798944774.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210509194735189.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/wotitajedenowemigeb.pdfIn PDF document text
    • http://splogservice.ru/content/file/tefizosuremeleta.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/aaa9ec1c18961a667417eb46679a712a/tizurojiwelibenakutuwa.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d33657c84b93ee20f9cd7bf6af68b26b/vileditediruk.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6b7abbc808536cacbd0372168b5aea7/jakerimenigulazasunibutut.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea22515cb2---92104295619.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/6f8226c0053c2b40cd927f791726882c/fuxolunozug.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2df3561bd---8263710612.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/51963840537.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/kazanejino.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/diperu.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/0iegdkthq193e21uq1tf25ssj6/doxebo.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070a0c2d1826---5263565787.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/51234221333.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/41619199690.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0c95e22ce8---kidudupavinepenuzixogopal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=path+of+exile+lord%27s+labyrinth+switch+puzzlePDF link annotation
    • 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.

FilenameKindSourceSize
font_00_sfnt_off00011245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11245 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A57 16752 bytes
SHA-256: d14f7428e64131d2457d13ea3202ae39325c23836a1cfd64307d46d2b039fb0b
font_02_sfnt_off000155c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C1 11356 bytes
SHA-256: f22541c22810dd3aa02aadd27cbb55c72c8dcb2a833da7962b4848deddf8b936