PDF malware analysis — malicious · 22f2c0acca1c8566

MALICIOUS

PDF

83.3 KB Created: 2021-08-19 17:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: f8fc9298f5b7c70260b5a0d2deb36244 SHA-1: bd166f0650a24eb6816f6eb790c5dfe662ddc9b3 SHA-256: 22f2c0acca1c85668ec97b6860cfbc13ba3c9c2ee4b0fc2ebb79bea2df51afc1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics indicate the PDF acts as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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://krisoc.ru/uplcv?utm_term=revising+and+editing+worksheets+6th+grade PDF link annotation
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/974b08fcfe6c6dba312379d1b3122832/34635144637.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c785053141---pufow.pdfIn PDF document text
- http://skolicka.eu/foto/images/file/sisibowaf.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3aa182494---garamotigi.pdfIn PDF document text
- http://benhvientantao.com/img_duhoc/files/gazavesugujurigu.pdfIn PDF document text
- http://kowel.com/ckfinder/userfiles/files/1623745781.pdfIn PDF document text
- http://designklasse.de/ckfinder/userfiles/files/totedulitob.pdfIn PDF document text
- http://www.lnk-creation.fr/upload/file/65816578660.pdfIn PDF document text
- http://creatinglifeoptions.com/userfiles/files/72408926545.pdfIn PDF document text
- https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51899310d7---solibefop.pdfIn PDF document text
- https://bdsvieclam.com/upload/files/22005345732.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c91620c1e---48085172012.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1f1034ec---73913987860.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/d7feaa2f42d69bca7549fee24748adda/63585907752.pdfIn PDF document text
- http://www.chp.pl/ckfinder/userfiles/files/lubalotopevalowenajugib.pdfIn PDF document text
- http://heatherjansch.com/ckfinder/userfiles/files/gesixuvedamibefurukene.pdfIn PDF document text
- http://dr-onesrl.com/userfiles/files/95472023180.pdfIn PDF document text
- https://aitalk.vn/upload/files/dopiduxepubatovomow.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1e00bccd3a3666705349fd6e15d48308/gojewedilufotimavovu.pdfIn PDF document text
- https://office-agglo-larochelle.fr/userfiles/file/31257123310.pdfIn PDF document text
- https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/52cfab403c1c026dd8717fbc0274fa87/palaroxikudesalabawev.pdfIn PDF document text
- https://aterhesseg.com/up_image/file/50820644214.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990ab73358f---wijurugadi.pdfIn PDF document text
- http://ippinnudon.com/uploads/files/jonefulufaluzidasekezigiv.pdfIn PDF document text
- http://biurod9.pl/public/userfiles/file/7469710348.pdfIn PDF document text
- http://imi.vc/upload/files/zuxefesefujamike.pdfIn PDF document text
- https://ferdavagnar.is/images/fck/file/57697933315.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_off0000e36c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE36C	16188 bytes
SHA-256: `bf426996493c815258a98ca3225e24fd92b36a5f97a44731a2262420ed2fdd36`
`font_01_sfnt_off00010d1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D1E	10940 bytes
SHA-256: `fbb75db5fca57979b81c986bf56a7851c82dca38393d96ba73c2ff29465268b5`
`font_02_sfnt_off0001265b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1265B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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