PDF malware analysis — malicious · 0f7a06415a00ef6b

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 20:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 457f4c09b3d51bd245370eb79a603da8 SHA-1: e15567404fdd0f07b546c4ceb801ed61519b64c7 SHA-256: 0f7a06415a00ef6b7746830f0671e079050409ae9c8510d97d33fa1becbc8794

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of a visual download button further supports a lure-based attack pattern. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

Heuristics 7

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.
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://philabc.ru/uplcv?utm_term=live+wallpaper+download PDF link annotation
- http://dui-antidote.com/images/userfiles/file/3529926164.pdfIn PDF document text
- https://rhuyscampingcar.fr/images/files/tavulizexejidevowu.pdfIn PDF document text
- http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/duzedisetuzopizifaza.pdfIn PDF document text
- https://jatransfer.com/userfiles/file/58664062083.pdfIn PDF document text
- http://sonnenheizung.ch/fckeditor/editor/images/file/80098551357.pdfIn PDF document text
- https://extremedriveline.com/ckfinder/userfiles/files/nezisolurakupibulakajeme.pdfIn PDF document text
- https://tivirtual.com/userfiles/file/85614008699.pdfIn PDF document text
- http://softwarefactory.nl/images/file/rerobimomofebebi.pdfIn PDF document text
- https://at1-turbo-j3t.com/contents/files/66987749480.pdfIn PDF document text
- http://metalzilemboeventi.com/userfiles/files/96476740699.pdfIn PDF document text
- https://edouardweil.com/userfiles/file/sukojabobakijuxawe.pdfIn PDF document text
- http://diadiemvui.com/upload/files/51941204535.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143be0c70480---woredugibife.pdfIn PDF document text
- http://svenskafik.se/uploads/fckeditor/file/23693384096.pdfIn PDF document text
- https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/13115829048.pdfIn PDF document text
- http://szintai.hu/ckfinder/userfiles/files/32300196641.pdfIn PDF document text
- https://linardi.ru/files/file/6679004295.pdfIn PDF document text
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5ed337ca3---nimevisopalujepubewi.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/600cf09552c309fa14047c22249d6740/98275430591.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614148a88e6fb---lamaxiwusavekopiwifijemam.pdfIn PDF document text
- http://bmcnx.com/userfiles/file/67645838156.pdfIn PDF document text
- http://midel.me/userfiles/file/7090993583.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_off0000d64a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD64A	17572 bytes
SHA-256: `10856c4705f16cbfa27bfada9383392ba71791d7c130e2ea6e9ff5c8b71f72e3`
`font_01_sfnt_off0001043f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1043F	10228 bytes
SHA-256: `24ce64fa34724f834be0875824527fffa2327689124d9e7e072e2f38b3b7052f`
`font_02_sfnt_off00011b46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B46	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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