PDF malware analysis — malicious · 207f779c2c069897

MALICIOUS

PDF

83.8 KB Created: 2021-09-03 08:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 566dd138d9d37613cf4faa5f00e2d709 SHA-1: b9a87730b4888a11999daad6251526a86e46804e SHA-256: 207f779c2c06989751e81e5e2be8bb6a79e34e2b6fbd1e54eefe17745f7f697d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://theofficefurniturestore.com/ckfinder/userfiles/files/tusetogexiturulug.pdf In PDF document text
- https://nestaerospace.com/uploads/file/80701379081.pdfIn PDF document text
- https://bazab.ru/ckfinder/userfiles/files/92930817575.pdfIn PDF document text
- http://stellarvvv.ru/ckfinder/userfiles/files/78716633990.pdfIn PDF document text
- https://bdaudit.ro/userfiles/file/ribidamutisijiferotaso.pdfIn PDF document text
- http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/951j8084u2pun0du3a2os7o617/3601205578.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ada931e315d---99027760223.pdfIn PDF document text
- http://thebookmarkcafe.com/uploads/files/77169461560.pdfIn PDF document text
- http://acupunctuuryao.nl/ckfinder/userfiles/files/59919202168.pdfIn PDF document text
- http://dcbestwings.com/uploads/files/zisowevatudikasuvenemazer.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affdab35cfc---nagoxegekanabu.pdfIn PDF document text
- https://www.habitat-morvan.fr/ckfinder/userfiles/files/94634478120.pdfIn PDF document text
- http://standartbio.com/fckfiles/file/59427552205.pdfIn PDF document text
- https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/f5ae0f69d133fc352eaf3393e2b8b072/popivewokipogujojave.pdfIn PDF document text
- http://remaining-mc.de/userfiles/file/64976775200.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b73145abd4---vedetili.pdfIn PDF document text
- https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/a5jj3ah5vrjqrjpumeugeh3ujn/75278910259.pdfIn PDF document text
- https://denizlihorozu.com/resimler/files/54025100382.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160882a1e44782---rerovurubela.pdfIn PDF document text
- http://www.umadai.com/ckfinder/userfiles/files/polivetefefojuviwu.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/7d6bc54f3e8cdb7b444f991240069a12/76976143359.pdfIn PDF document text
- https://picinterior.com/ckfinder/userfiles/files/fupumufuriku.pdfIn PDF document text
- http://www.hydro-tg.pro/upload/file/88962758200.pdfIn PDF document text
- http://archerelectricsupply.com/userfiles/file/bikumodozosedepa.pdfIn PDF document text
- http://nhuaduongnhapkhauaz.org/upload/files/nolumuvexi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=my+favourite+book+essay+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_off0000e315.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE315	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fb27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB27	17764 bytes
SHA-256: `b2ae25af687f815771e8b30b1df6971d541ae60ec1530910a919e5c1d7b9a20e`
`font_02_sfnt_off000128ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128AC	10848 bytes
SHA-256: `ea1d59fb1058bd53c1c220487a11859f9bf127fd6c1264c7d87558e4fc7e85da`

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