PDF malware analysis — malicious · 4e532cd37711a3ad

MALICIOUS

PDF

81.2 KB Created: 2021-07-18 00:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 32b6f166e14ae360c383df515de8860e SHA-1: 4b6e4551a798e63d2d19882756395914f18b5e71 SHA-256: 4e532cd37711a3adc738ca73f60e460f69a22602b5982ae1f32054e176799fff

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the nature of the URLs and the 'link farm' heuristic implies an attempt to redirect users to malicious sites, likely involving embedded JavaScript for exploitation or further redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d700fe38b3---vejupupegitarusozisotinob.pdf In PDF document text
- http://sarljarry.fr/userfiles/file/gigajoxudirugilagazi.pdfIn PDF document text
- http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/bikopawulejurirefasosivaw.pdfIn PDF document text
- https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/04mrsntv82lmnjl7vk2qmqsimd/95123259904.pdfIn PDF document text
- http://wf515345.tw/CKEdit/upload/files/borewipuzikinumobe.pdfIn PDF document text
- https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb9c82a36e---54539754734.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160860a30a3f03---3810859891.pdfIn PDF document text
- http://stauarchitetti.eu/userfiles/files/xepegimuseguluresofoname.pdfIn PDF document text
- http://fontanarosaserigrafia.it/userfiles/file/dabubupaxiguwesigeza.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c26fc7df33f000a0bcf451d946439931/55904445271.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075781a28103---27122364225.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608960e4e8e14---furofabiwedakaraj.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ea1f547e4---semizusuv.pdfIn PDF document text
- http://thallo-food.hu/uploads/ckfinder/userfiles/files/83136997666.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ee019a5f1---lojujodubakeribegiwaxawap.pdfIn PDF document text
- https://keralahappyjourney.com/ckfinder/userfiles/files/42286861912.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5e0534b6d490209f8340d0123a0f1c34/3204572791.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/zazomuvonorefofetusiru.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160865a246c836---juzizanezifiwilumizitag.pdfIn PDF document text
- http://apexnepaltravel.com/userfiles/file/biserogoxojob.pdfIn PDF document text
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a383d74e7a3---70244869779.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/14ef5587eac618cec8bbdfa224e76849/11151557815.pdfIn PDF document text
- http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb564f820c4---6343988103.pdfIn PDF document text
- http://progfin.pl/userfiles/file/tatewotixewenetesomigadip.pdfIn PDF document text
- http://sola-brothers.com/userfiles/file/petijemuridixa.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091c38c9c0f2---95745142502.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=abcd+2+full+movie+download+480p+openloadPDF 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_off0000d560.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD560	18200 bytes
SHA-256: `5e89fb67c5d46512c017793cfc212eae9bd9eae2fd05657e5e47302af477c8ca`
`font_01_sfnt_off0001048b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1048B	11316 bytes
SHA-256: `690ab3611ab946b6701faebd50021c538a78d76015566eebee2d37d7d3b2b142`
`font_02_sfnt_off00011f1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F1C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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