PDF malware analysis — malicious · 34ce8de917b6978f

MALICIOUS

PDF

87.1 KB Created: 2021-09-08 00:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0c5a5b993caaf40bc8bd75d401bf4fcf SHA-1: 0eb5f1675334e726fe5375d40625969b519b7e98 SHA-256: 34ce8de917b6978f255e165b30b6f165e5721ed6a6000ff10794ebc723df6419

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. The document contains numerous links to external PDFs hosted on compromised WordPress sites and disposable domains, suggesting a link farm for SEO poisoning or redirection. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/dsskiodoj90u2i3i69k77vobm1/gazosatabanemajusesika.pdf In PDF document text
- http://ptichile.cl/userfiles/file/ropisotowi.pdfIn PDF document text
- http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097286178cdd---20302859423.pdfIn PDF document text
- https://casabresciani.it/uploads/file/13043453309.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096f9088b1f6---daxifibufir.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61de47e2a1---jajazivujoro.pdfIn PDF document text
- https://aprilboya.com/userfiles/file/vojelakizixenoweze.pdfIn PDF document text
- http://taeguektour.com/FileData/ckfinder/files/20210625_DB00B8C1704A20B5.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/6437b83822e6e735676230794d2fd22a/kusuborilivusafepipovix.pdfIn PDF document text
- http://csc-0898.com/userfiles/file/20210826231110_0f9zk0.pdfIn PDF document text
- http://youandisagenix.com/ckfinder/userfiles/files/kowimememofojus.pdfIn PDF document text
- http://cherryontop.pl/upload/fotki/file/59215704435.pdfIn PDF document text
- http://akvatoria.by/UserFiles/files/94326852617.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/704796f66db527add5f39d239410e99e/falimef.pdfIn PDF document text
- https://marbeyoyun.com/calisma2/files/uploads/36185821325.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/ed8eb239b05001fd17126aa72819d6ea/galajisatigutosuwovez.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/8299f5c3acffc63fb99d654b7dfc0042/sunawuzopasupezidiro.pdfIn PDF document text
- https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/bmit8l32s36gjf1i32e0e1l0km/56696800650.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc7e850488---dugaxofeduponufi.pdfIn PDF document text
- https://isleo.com/i_photos/file/saxide.pdfIn PDF document text
- http://lezeckastenakosice.sk/upload/files/gujowawulitijasigegogase.pdfIn PDF document text
- http://neoneophytou.com/ckfinder/userfiles/files/goparilewalekage.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5ef33bdfb7e3082f0bb307d0d053d381/selulukibag.pdfIn PDF document text
- https://djennebeads.com/nbloom/fckuploads/file/7196713016.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a038c91b68c---13900666738.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=oraciones+impersonales+tipos+pdfPDF 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_off0000ecaf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECAF	10804 bytes
SHA-256: `7d6ed536aeb0043bc46a857b9d12f535259ebe0a3d92774a8bda99b2d3871288`
`font_01_sfnt_off00010594.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10594	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011da6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DA6	19316 bytes
SHA-256: `763e67f5163680d5e7dc782f18c68110cd03f189caed61551016bbd49e39661d`

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