PDF malware analysis — malicious · 46c48e93b032d5a9

MALICIOUS

PDF

73.9 KB Created: 2021-07-04 06:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 082ea6e814a555dacb1874d943ad1c7d SHA-1: 5834a3ccae587669e38489892281717b0646c6fe SHA-256: 46c48e93b032d5a998f49e55c4e4cb8a844dd422e931c18c6cb03a0a4f00c310

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous external URLs pointing to potentially compromised websites or disposable hosting. The presence of embedded URLs and the nature of the link farm suggest it's designed to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9837

Heuristics 6

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
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 https://wastran.ru/uplcv?utm_term=tickly+octopus+pdf PDF link annotation
- http://www.yoko-ono.be/images/userfiles/file/pazomidifi.pdfIn PDF document text
- http://windmill-bv.com/userfiles/files/9942990324.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/d608e9cb3b08629e376e4cb0ef8ad403/18850115027.pdfIn PDF document text
- http://harasim.cz/uploaded/files/42616114898.pdfIn PDF document text
- https://burlingame.com/wysiwygfiles/file/5378881153.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0ef49604c---61163982471.pdfIn PDF document text
- http://nct-vn.com/userfiles/file/gizijibaxevurapagiti.pdfIn PDF document text
- http://ptaki.info/imgekoprojekty/files/14458666956.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0b6155a70a92a07dbe86f2cd148640de/wurigoti.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/aa7hjrgmqo5pda1c39s65lqtc0/mozoxowifipetitijeti.pdfIn PDF document text
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/75af4e9f273fb3b682771f4db9e82733/likedafurilamazuje.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/46ea7998e026f79e8919bea4814e6748/98208906941.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8bd8073f1---20844322883.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a77af8181e7---wodumovakivavurinelupet.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc72dc262b---97325436558.pdfIn PDF document text
- http://cesishotel.lv/res/wysiwyg/file/61717432483.pdfIn PDF document text
- http://phantasos.org/userfiles/file/zoweruxezadogematem.pdfIn PDF document text
- http://nowyhotelik.pl/userfiles/file/todizamafene.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0fc40fa0f---sozuxuxu.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52fb33cc4---20123491772.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ihj2ct30mg4ij2bsrl76k8etoj/bamadivutasadeza.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/5uhh3d7jojdob894tmvhsnod85/mopuwuta.pdfIn PDF document text
- http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/bieo5530q97dad022n2hdoh1sf/75739834755.pdfIn PDF document text
- http://maility.pl_adresuserfiles/file/wuboto.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/34c265f469e1738d6051c1e68ac02066/95462835526.pdfIn PDF document text
- https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/74e0eb1c002c448299e8cc8ee9fffbe7/vudefenaropufowawab.pdfIn PDF document text
- https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/c5d84baceda6c9c5a30d7a694e8a6c05/26089068859.pdfIn PDF document text
- 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_off0000c03e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC03E	16332 bytes
SHA-256: `58d626f2646714935a8fa0d67d14e5eb6dd75f6d7fc2398ede57a9d361e01ec0`
`font_01_sfnt_off0000eaa0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAA0	10384 bytes
SHA-256: `112c11d36272c6fadc8f0bb21c5f3daf778576ae7db7c0ed2edcdadf3a4f805a`
`font_02_sfnt_off0001024a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1024A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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