PDF malware analysis — malicious · caa146c8872146c6

MALICIOUS

PDF

85.6 KB Created: 2021-07-25 22:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 5207deb892dd93fd82234423987d0c3c SHA-1: 0161ebe1e9f3f352af0d41ca52817ac6aaa18797 SHA-256: caa146c8872146c6b3c6f05c848ca39673e0564f5e163810c80fc3ee610616a2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to potentially compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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 http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/mowewebevifiw.pdf In PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/07d128fb68e2f9962f5a8a85afc0f411/29956509863.pdfIn PDF document text
- https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/37a092cd65e064f4a48a3d8647e84678/68434891757.pdfIn PDF document text
- https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cada32c7e40f76ffb80bde3b98a35d97/46659760156.pdfIn PDF document text
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cd67b7239---7861961851.pdfIn PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/f8bc04faaa10b7e2e29667e0cf05382b/powutijaz.pdfIn PDF document text
- http://hilltop1976.com/clients/24685/File/11815505917.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace35b25dae---32130859846.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51da9f1969---boloramemalumejido.pdfIn PDF document text
- https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/aa29eb222f88c33c9e7d4f1f981229c2/rodirufaliwamitesiwubozop.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf0fcb2ab5---pafuzilukexikewubarubidu.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/0d3kbpm1kqdtgqh4pb55h5t214/6934314095.pdfIn PDF document text
- http://svaz-podnikani.cz/files/file/vorojadim.pdfIn PDF document text
- http://eugensa.lt/app/webroot/uploads/userfiles/files/19691645923.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a22fbd2f378fa6eb7b12d597aedbf0dd/96851307069.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a511384fb1cf9f87579d39ca694afa17/kiwixoximavuvexaxe.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160841b45adf5c---naten.pdfIn PDF document text
- http://saipanbooking.com/FileData/ckfinder/files/20210619_7DFED86ED8028CCA.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f8f05a871---tafofet.pdfIn PDF document text
- http://dichvugiayphep.net/hinhanh_fckeditor/file/41060315954.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/f0sk3m24uf2tdrrovh0bln0mc4/joxoja.pdfIn PDF document text
- http://goref.ru/files/file/lefemirupixa.pdfIn PDF document text
- https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/70c56d963ad96a11fc812fc857e6418a/jevuledojad.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0357d52a---sudorezimiv.pdfIn PDF document text
- https://journeywithmypet.com/ckfinder/userfiles/files/93267828119.pdfIn PDF document text
- http://yossy.biz/userfiles/file/54915324873.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=german+verbs+with+prepositions+list+pdf+ponsPDF 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_off0000e7b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7B7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ffc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFC9	18172 bytes
SHA-256: `0c924e028f17abf8ae5ee8e087dd31b54d3c7b6efb2689ca7a6459ec3870b6a8`
`font_02_sfnt_off00012e4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E4B	11096 bytes
SHA-256: `80c453eb8aa5ae8aa9cdf6a2fe4d88ed5f5718eb09d2d4ec507f98da71619cf1`

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