PDF malware analysis — malicious · 0cf9a77e7185baef

MALICIOUS

PDF

73.5 KB Created: 2021-09-20 15:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 9c320a6efe4ca00fc2a42b47a0f6d8c9 SHA-1: dfa671a1e3010b9083bbfc65f0e5d8e865b600aa SHA-256: 0cf9a77e7185baeff8eac9928550113e37fefe6175053c2e62192992e91e213a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URI heuristics and the sheer volume of links indicate an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.7417

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://catamma.ru/uplcv?utm_term=clash+of+clans+new+version+2020+download PDF link annotation
- http://villalapinetafavignana.it/userfiles/files/zegisomezajekifusumak.pdfIn PDF document text
- http://zekejozsef.eu/FCKfeltoltott/file/koxolodibolapemesege.pdfIn PDF document text
- http://drsuthichai.com/userfiles/files/37832170644.pdfIn PDF document text
- https://reparationmobile.net/userfiles/file/36001485319.pdfIn PDF document text
- http://amicissiapiemonteisa.it/userfiles/files/32505829719.pdfIn PDF document text
- https://shipnhanh247.vn/asset/files/jasuzaj.pdfIn PDF document text
- http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sowula.pdfIn PDF document text
- http://anais.terminarz.online/kosmetyczka/krakow/files/87017923561.pdfIn PDF document text
- https://hotelharmika.com/assets/userfiles/files/23880848359.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16146cecc7fedc---26958526103.pdfIn PDF document text
- http://tonyprins.nl/images/uploads/file/31386552169.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7e916b7b4---sobuwajifulamob.pdfIn PDF document text
- http://dpnovelty.com/upload/files/sunilitetosugimuka.pdfIn PDF document text
- https://lose-weight.tw/upload/files/22851742173.pdfIn PDF document text
- http://megaprestige.ru/uploads/files/xukajorenegagerev.pdfIn PDF document text
- http://autoscuolapezzano.it/userfiles/files/kovutivapoxos.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/844edc8be55524b4f8fd5649fad1681b/41469437737.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/0ddua28mk3fh2hgca3l0vgacpu/66630032175.pdfIn PDF document text
- https://jackinthegym.com/uploads/files/202109021914478378.pdfIn PDF document text
- https://shiokuda2.com/contents/files/gatezufuzikad.pdfIn PDF document text
- http://naplesredeals.com/userfiles/files/rebizaz.pdfIn PDF document text
- https://landtop.com/filespath/files/20210909221826.pdfIn PDF document text
- http://wedding-box100.com/uploads/files/202109181606008444.pdfIn PDF document text
- http://grimastone.ru/files/regovozevudozoliw.pdfIn PDF document text
- https://pleasanton.com/wysiwygfiles/file/91108272635.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_off0000c861.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC861	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e078.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE078	10900 bytes
SHA-256: `b2fc4509c19f0df9f1e7313cefbdf50e6c79f007d4a095869b8356b053240415`
`font_02_sfnt_off0000f9ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9BA	15900 bytes
SHA-256: `a8763f210ee438a1d0fece52bd18729cd08d317c62915b0bff3816b461c77294`

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