PDF malware analysis — malicious · 7a16602b2649d038

MALICIOUS

PDF

76.2 KB Created: 2021-09-06 08:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 3f981e344c30d45446c4711ce8350ea6 SHA-1: dddf013739e4e2738604e1d9c90e299b5f41def2 SHA-256: 7a16602b2649d0386c5199abc69a60757dcc534dc574a87c800fa47296b66cc2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. Heuristics indicate it functions as a link farm, directing users to compromised CMS upload storage and potentially disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.6966

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/85d1b3b709852f2c9e4ad36b332c5853/mizalusedoberi.pdf In PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160906f1d7cbf3---47593202624.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa3f92151---murepurunigojuka.pdfIn PDF document text
- http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/re11ueuibtudvn87nj1cfecnoq/tinajurukug.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e4b9bef9d---vawiraku.pdfIn PDF document text
- https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/349048414d2f2ac0e387fea40d22d8b3/pixativixoviwumapokiwaziz.pdfIn PDF document text
- https://cowichanseniors.ca/userfiles/file/89305051335.pdfIn PDF document text
- https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ieq3f92b8orqhbspsgmrv8b0c0/baparumofew.pdfIn PDF document text
- http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/34866007216.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a6410688c5---40144865454.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/26901611e8da227ef372609aad4b1f50/37833336967.pdfIn PDF document text
- https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/k8dp8frj9hqv4gj2oe7e5e0s76/tedonanufuletanesanekav.pdfIn PDF document text
- https://wheelmartthailand.com/image/upload/File/nokudoxijuraxapop.pdfIn PDF document text
- http://kaithompson.com/userfiles/file/14208401265.pdfIn PDF document text
- https://gbagencement.fr/uploads/file/14716015253.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b90f3850a3---21467194238.pdfIn PDF document text
- http://ck-tct.ru/userfiles/file/59342340963.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/jr3fqpnlg1kdqt2epoi2re9ekh/6461063939.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f33d6fa58---jajevaju.pdfIn PDF document text
- http://iraneto.com/basefile/iranetocom/files/47331960901.pdfIn PDF document text
- http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/39812197540.pdfIn PDF document text
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092735967fba---watabozu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=romeo+and+juliet+sparknotes+pdfPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e4c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4C9	16608 bytes
SHA-256: `ba2ee8b557b5455116a31546fda68132812d7a9be716ecc2e70b6c2fe4cc9640`
`font_01_sfnt_off00010fc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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