PDF malware analysis — malicious · b007ea54cf5e64e1

MALICIOUS

PDF

80.5 KB Created: 2021-09-20 04:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 223ae36daf4d76a2c66d5b582c68b43d SHA-1: dd8e11255d97a1eec382f664d6067993270842c2 SHA-256: b007ea54cf5e64e1d74e84028f12d78a5f50f8065485a4fcd8a89d56894d7002

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised WordPress sites or other disposable hosting domains. The primary purpose appears to be redirecting users to phishing or malware download pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://ketchas.ru/uplcv?utm_term=hp+android+bekas+murah+surabaya PDF link annotation
- http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/2586973012.pdfIn PDF document text
- http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/29882059668.pdfIn PDF document text
- http://royalwedding.jp/images/blog/file/mapexudexen.pdfIn PDF document text
- https://tasivn.com/upload/ck/files/lelomujabagetiwu.pdfIn PDF document text
- http://le383.com/uploads/files/40170380547.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614028b2dcaa3---98341247330.pdfIn PDF document text
- http://handsonmontessoripk.com/userfiles/files/74835595061.pdfIn PDF document text
- http://roland-toys.eu/userfiles/file/85484115187.pdfIn PDF document text
- https://pima-alarms.net/slicice/file/paradi.pdfIn PDF document text
- http://koryosushi.com/uploads/files/gitumokekonumuma.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/58b1abbec0a614f98d78532c2e64de3c/67725737137.pdfIn PDF document text
- https://portofcrotone.com/dati/upload/file/86270638104.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16144d7c633a14---27109497458.pdfIn PDF document text
- http://filtrydokoparek.pl/img/all/roxixolitukezekam.pdfIn PDF document text
- http://salkim.com/userfiles/file/27755522709.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309330ee18e---kamevasarexafiwotujajo.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161448bd7e78ef---rerogitirubemobepad.pdfIn PDF document text
- http://aisne.proximeo.com/ckfinder/userfiles/files/xatubanopoxi.pdfIn PDF document text
- https://sieuthigo.vn/upload/ck/files/66694783551.pdfIn PDF document text
- http://studiosimonepantaleo.it/userfiles/files/ladidulajovokunazeri.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef697b2eb1---45258270759.pdfIn PDF document text
- https://chennothinterios.com/uploads/file/59142631855.pdfIn PDF document text
- https://www.tristar-technology.com/ckfinder/userfiles/files/61653347375.pdfIn PDF document text
- https://htlexpress.com/ckfinder/userfiles/files/bitubug.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_off0000d84e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD84E	16616 bytes
SHA-256: `bddce41fae912b9b1ff5e1334cd0e4484e95e0aa5b00efe98cdaa6cc68121991`
`font_01_sfnt_off000103af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103AF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011bc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BC6	10952 bytes
SHA-256: `f8eba7065b89ea25ce94b4ff3f13f5fa44e60feb4ed8e21d74d740fb7a0dbf4d`

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