PDF malware analysis — malicious · b51fc602eeb1fa9e

MALICIOUS

PDF

90.6 KB Created: 2021-07-21 10:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 921e7ff4ffd43080c5da248c76959973 SHA-1: 7e6af92d4c8937b2182a71cc3dd2cb86fe381252 SHA-256: b51fc602eeb1fa9ec5c4a5097c7bc6d66fa781b6d96051f724fecb815ea191b4

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0. Static analysis revealed that the PDF contains a link farm, with many URLs pointing to disposable hosting or compromised CMS upload directories. The primary purpose appears to be directing users to external malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier suspicious score 0.4369

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 http://rajskiewakacje.pl/userfiles/file/91610779960.pdf In PDF document text
- http://blissworldbeauty.com/newerac2c/userfiles/file/wamoxabevebitujotuvodazo.pdfIn PDF document text
- https://e-uchebnici.com/img/file/tefemopam.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc2a1ee522---magisalakulazakarorujez.pdfIn PDF document text
- http://doyen.cc/images/upload/File/90208493796.pdfIn PDF document text
- http://jagodkaprzedszkole.pl/userfiles/file/84203820926.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/glombni42e4j32c3o93rjtlj0c/nowoziw.pdfIn PDF document text
- https://anyimaker.com/upload/users/files/liwafuk.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38bfd97110---siwarotekabaxodufalame.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/67139961428.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b453133f57---92924065563.pdfIn PDF document text
- https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/con7ni1e0m80kunpfr5vjb8ubn/mobuvaxolitoduwineginefi.pdfIn PDF document text
- http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/foxofebebapudu.pdfIn PDF document text
- https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607deef2448b3---12604840249.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c44622c0aa---newumopavefuwotuniwisavo.pdfIn PDF document text
- http://apcmagon.com/userfiles/56936305993.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b2b15cac1305f3b8e45c7a5711278489/77192201522.pdfIn PDF document text
- https://iamtimeshare.com/userfiles/file/mipeteporokadarugajekabo.pdfIn PDF document text
- http://cck-brno.cz/ckfinder/userfiles/files/tamumisapitarog.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/153d6bd941059e2b23517f9c5924bd50/62373802244.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160e63a81a38f4---dedojokavunisupipugese.pdfIn PDF document text
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf413b77404---40013876916.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=black+yellow+red+vertical+stripe+flagPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off00010c47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C47	11104 bytes
SHA-256: `efa7a5ee4a43b87ca8db0697ecd522cd169b57561bcba5d9effa33aae3d39369`
`font_01_sfnt_off0001263c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1263C	18276 bytes
SHA-256: `3b0259a2b61f4cd37bc8b7d5d32abf66f736c429eba48f879cc064689ba9d3ef`
`font_02_sfnt_off000154a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x154A0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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