PDF malware analysis — malicious · 91f0ec7fba8d8a49

MALICIOUS

PDF

89.5 KB Created: 2021-08-10 05:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: b7950723faf8b30d88e0d5c6589f4924 SHA-1: 2f041ee31177bc000ffe91564f58d6c2f77289eb SHA-256: 91f0ec7fba8d8a49d202ad367beb67f9062754b837b6b08111780945c2da8983

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://bdn10.cz/files/file/75975635315.pdf In PDF document text
- https://tenshinorchids.com/FCKeditor_upload/file/matigalikanibugifudam.pdfIn PDF document text
- https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/xaxedivoligopazinu.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ijdme6pkgt9blacfkkb5obrr32/zedixoteborivijid.pdfIn PDF document text
- http://duhochmis.com/files/uploaded/files/fowosinibenakej.pdfIn PDF document text
- https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/3lqfkbsrscv65nm9vbg2cgtpql/mugiragowuxonufukuxoduro.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607006bc758c7---40616332033.pdfIn PDF document text
- https://telorgabus.com/contents//files/73537954251.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e495c307e---2965010092.pdfIn PDF document text
- http://saxonrt.hu/img/userfiles/files/solebi.pdfIn PDF document text
- http://slp70.com/clients/873855/File/31704801847.pdfIn PDF document text
- http://xnucleus.com/members//member_images/files/11384976606.pdfIn PDF document text
- http://jarosi.hu/files/file/40735408197.pdfIn PDF document text
- https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/fa39f57979550c44b37f451838b634da/zevep.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160849136f13d7---9862546914.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e0bd7fed4---54708409965.pdfIn PDF document text
- http://scamps.biz/userfiles/file/73897553400.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841e20b6239---21475803596.pdfIn PDF document text
- https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8c4b4668c---pamakanegupipobawepaziba.pdfIn PDF document text
- http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/kipekuruxi.pdfIn PDF document text
- http://gzky.cn/dubeite/ckfinder/userfiles/files/20210714_045713.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609179a2a7b9d---bezegofubozilebejikazu.pdfIn PDF document text
- http://www.corazondelsol.es/ckfinder/userfiles/files/13995281270.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607325558a84d---63645448425.pdfIn PDF document text
- http://4reality.cz/userfiles/files/pijurisibemorit.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=descargar+minecraft+1.14.4+para+pc+launcher+fenixPDF 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_off0000f4ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4EA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010d01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D01	11208 bytes
SHA-256: `d362034f4e1878d0dc2467a5a861ea23f262b0d72bcea9f5b25d5c39ec8f14b9`
`font_02_sfnt_off0001272d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1272D	18824 bytes
SHA-256: `fb8837b5091818d1401e2906bb914f6667adfe2dcbc8070399585fefda166aa5`

Open this report in the interactive analyzer, or submit your own file for analysis.