PDF malware analysis — malicious · 489e73bb711bb4ca

MALICIOUS

PDF

84.2 KB Created: 2021-09-02 15:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 7b6931228026dea11b0ed96c4b6e6b71 SHA-1: e17d6057614cdd8a7fc1555b0b542006d9e539db SHA-256: 489e73bb711bb4ca09b3a47c270e8347377cf4560c1912ab2eb8ab5cc3376d9b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories and link farms hosted on disposable domains, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL patterns indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://queure.ru/uplcv?utm_term=regalos+para+novios+manualidades PDF link annotation
- http://africanhairbraidingsalon.com/userfiles/file/deteviralomu.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/gc68e2amuiut36l58k5fgl6hkr/mafojokaw.pdfIn PDF document text
- http://feynburg-uhren.de/uploads/xazanosiviti.pdfIn PDF document text
- https://codecs.roimages/file/10125651065.pdfIn PDF document text
- http://e-kva.ru/admin/ckfinder/userfiles/files/zasevejipogumukabufir.pdfIn PDF document text
- https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/37bdb00e459d0503c94488c0cef04907/97650361635.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160bf09dcc125f---26775765412.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/10a56d493b30f8a966ce2eee02ac387e/59934202774.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16071313253a1e---kotilifopomalun.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dcc5a1579---vowibixa.pdfIn PDF document text
- https://cribpointonline.org/cribpointonline/userimages/file/fisesodisutubir.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5842dce2ff---41145500592.pdfIn PDF document text
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de956938e---24223181267.pdfIn PDF document text
- https://cortemadera.com/wysiwygfiles/file/65685283879.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/273610ede2865e2ffa588d32effb8d09/84887689188.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/6356091994.pdfIn PDF document text
- https://anukulagrotech.com/userfiles/file/rotodixilejojila.pdfIn PDF document text
- http://delvalle68.com/clients/54584/File/bivejigawojozomu.pdfIn PDF document text
- http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac00551b25a---18749216809.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/lojunejima.pdfIn PDF document text
- http://ximangsongthao.com/app/webroot/uploads/files/34320581825.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/pe0r0v4p60gbuhltc6nf3g8k9e/nilovisutubawejemedan.pdfIn PDF document text
- http://diamond6ranch.com/userfiles/file/bawipageduzapeperitekeja.pdfIn PDF document text
- https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/qiaugk3t0utfvot1te656ku668/35206923970.pdfIn PDF document text
- https://perfecthospital.org/FCKeditor/file/birejixemiluvojis.pdfIn PDF document text
- https://www.posluh.hr/ckfinder/userfiles/files/77670731547.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_off0000de98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE98	20148 bytes
SHA-256: `93adce472b7907bad20707aa37d01489d1af594e3f35b2297234fa1e86f7a52b`
`font_01_sfnt_off00011228.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11228	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012a3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A3F	10848 bytes
SHA-256: `cf473e9787b9af71aa7dc09281664b1266a53180b3f58c5319d3d693158c460c`

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