PDF malware analysis — malicious · 560d0f88712d4491

MALICIOUS

PDF

89.1 KB Created: 2021-09-04 19:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 751dfc9a06521840f633676691eec47e SHA-1: 6c6ea60e76949310fae2861aac20355316992d9b SHA-256: 560d0f88712d449164eed777e4ae3c7d0a93438e32c4e26b2ba26edb9e7253de

224 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, specifically requesting recovery secrets or private keys, which is a critical finding. It also contains numerous links to potentially compromised WordPress upload directories and disposable hosting, suggesting an attempt to host malicious content or redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing attack aimed at credential or secret harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

Heuristics 8

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://oklogistic.lv/upload/file/99799488827.pdf In PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe3318368c---sigib.pdfIn PDF document text
- http://reicar.dk/userfiles/file/11856672910.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/2a417761f627afea04dca7ba4095d449/gekixutekuxa.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/f80q5456srbk7onn636vfdhab9/vogevoboxa.pdfIn PDF document text
- http://paroissedementon.fr/upload/files/99744456046.pdfIn PDF document text
- http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zaxavolopexibovidezivuli.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04888e2540---vidapifazofemozasuwi.pdfIn PDF document text
- https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086664ae52ad---jinovedadorojuwarumezu.pdfIn PDF document text
- http://polyalpan.hu/_user/file/kokezasutizebavolise.pdfIn PDF document text
- https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/71216d2ef8c9f2ba414ea1e5195f96fa/20022391300.pdfIn PDF document text
- http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/58967099751.pdfIn PDF document text
- https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/d3ef71c2dcf046e756af33260e793b9a/naxeligokikimonalexunutam.pdfIn PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb9986876---82799885275.pdfIn PDF document text
- http://atut-biuro.com/uploaded/file/xidemaxiw.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e1b17b7c13b5b6aa1142ef19a493e9f8/66918095282.pdfIn PDF document text
- http://jx4d.com/userfiles/file/48962229634.pdfIn PDF document text
- http://bigcool.net/webroot/img/files/18747080689.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bfd5c5a11---78492374217.pdfIn PDF document text
- http://bahsclassof1965.com/clients/1/1d/1db829f64c2e26d3b32b12ccabba4d7c/File/60164776041.pdfIn PDF document text
- http://www.sname.org.tw/sname/ckfinder/userfiles/files/76160356287.pdfIn PDF document text
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/61c4jdpk9u4rlapt8pd89io830/gojinubavaluper.pdfIn PDF document text
- http://studioriggio.it/userfiles/files/tagugaf.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/0e1cda67e2a5d8d4fe012fb632d56510/ravilefenito.pdfIn PDF document text
- https://linardi.ru/files/file/rozawulagadojuvujonifot.pdfIn PDF document text
- http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32df09b6c7---lijux.pdfIn PDF document text
- https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ol7dm14c9edq2gousif07vf6ts/93612249042.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=digital+signature+pdf+not+workingPDF 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_off0000f79a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF79A	17296 bytes
SHA-256: `b895d8d2113aa06a8163dad4a49c982f5586bf2f0d097d3e1f9566d71f044815`
`font_01_sfnt_off000124cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124CC	10952 bytes
SHA-256: `9a1163cb7e6d740ba3bee3e45bbb962acd698b07f37a6eb661aeeadd3a2db908`
`font_02_sfnt_off00013e35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E35	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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