PDF malware analysis — malicious · 1f0b305f0d00734a

MALICIOUS

PDF

92.1 KB Created: 2021-06-28 09:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 2def9dee21c12385921fccffaea75153 SHA-1: a26f06f79b4b9e4dcb595c00bb40a4bbd1026434 SHA-256: 1f0b305f0d00734a4604a82b44599b1853b74f4bb556ae1b75b96d4a5f7f1f6d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as Pdf.Phishing.Trojan. It contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. Embedded JavaScript was also detected, suggesting potential malicious scripting capabilities. The combination of these factors indicates a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a722e11c---legotosigomajefov.pdf In PDF document text
- https://cakenepal.com/userfiles/file/zokume.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/03d7b213ddf659f0e9e1f265f7754e55/8614707961.pdfIn PDF document text
- https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/sh7j75gf6ashlisn5bekur4g5u/jetebezibe.pdfIn PDF document text
- http://drthchowdary.net/userfiles/file/novifexenafu.pdfIn PDF document text
- https://reparation-mobile.net/userfiles/file/661111140.pdfIn PDF document text
- https://starwebline.com/calisma2/files/uploads/zozobewajev.pdfIn PDF document text
- https://searchlink.org/userfiles//file/buvifatati.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/b6ecd332ae8f00f7c5ce1a0700cb0abc/91562464992.pdfIn PDF document text
- http://blow-w124.com/js/upload/files/65410831090.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/hqgpvsff692onhra3p7m12ou9j/wepodunas.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d47ea1bfb67---50171992316.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f772364c3c038e268e1e7e8d8691f84b/65695002860.pdfIn PDF document text
- http://s8radziejowice-paszkow.pl/userfiles/file/banigilo.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/7a1qcvi1frub2dps9ptbfc5cc0/vinebifojivorogigabej.pdfIn PDF document text
- https://efnnma.org/files/file/diropuxikuraridezima.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa19d8e964---3140202928.pdfIn PDF document text
- https://mannerfeltdesignteam.se/ckfinder/userfiles/files/25690308624.pdfIn PDF document text
- https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/r0r6fu5357iqrmc14tt0s58esj/tuwije.pdfIn PDF document text
- https://machnhaduong.com/images/uploads/files/1021538589.pdfIn PDF document text
- https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/of8jeu703l9d7vmn2o07cf3rk5/71878499500.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/da26b3f2476296144bd870d8eba57824/70186861422.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/4328b2f3f699ae9eb906d1a43e90d367/93397467407.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=beef+stroganoff+with+cream+of+mushroom+soup+without+sour+creamPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In 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_off000103e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103E7	17188 bytes
SHA-256: `b603f772095d705b17094850f00e258e2ffbdc991d7370e0d6ebca40c61e4612`
`font_01_sfnt_off00013073.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13073	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001488a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1488A	11120 bytes
SHA-256: `ccc6b01a08bdea6c152897e9ee63e7da0435e65906dd906f1506be79a71cc488`

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