PDF malware analysis — malicious · 9d5b7eb91a3db601

MALICIOUS

PDF

85.1 KB Created: 2021-07-05 00:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: df6db8e7d4fce0f5ae72dfa2da3d6e66 SHA-1: 761c9d1acd01be4312f7985bcc7b6eb8abb9c096 SHA-256: 9d5b7eb91a3db60169302f092c0a262b396f263035086b070ef298485c7f9ada

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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=departmentalization+by+location PDF link annotation
- http://pmmagic.vn/userfiles/file/wilib.pdfIn PDF document text
- http://anandtouristcorporation.com/uploads/56589862566.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce93accb5fb---rukunegomedijupokaw.pdfIn PDF document text
- http://abpaluso.com/upload/file/8982967830.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/5d27fa26af13ffc090451b8730c96d31/wepulejazuweberuronanazak.pdfIn PDF document text
- http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/vinimorotevukaxoduka.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b04f21aa5---javusovepep.pdfIn PDF document text
- http://chromowane.com/userfiles/file/5722422770.pdfIn PDF document text
- https://sasalidayanisma.org/uploads/file/40402175110.pdfIn PDF document text
- http://kondicionery-lubertsy.ru/upload_picture/file/mifosebadedamukurasofebox.pdfIn PDF document text
- http://www.emailposte.com/pictures/tajiwemam.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/21168498165.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/ke3s6ih37710uo2cl2damieupu/65715800994.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/qe9jel5ab1cks4jta6e7q43vpi/pidotigojeratadilapuji.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b627c7a055c---37488761400.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787ca7d1a5b---51478448163.pdfIn PDF document text
- http://vetranhtuong.info/luutru/files/91419480057.pdfIn PDF document text
- http://mya1fc.com/files/ckuploads/files/funofulewu.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075e1293d363---dexesisanageno.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608f71c44c202---xaperi.pdfIn PDF document text
- http://palazzodiaz.com/userfiles/files/52479343538.pdfIn PDF document text
- http://reguitti-engineering.it/userfiles/files/natixaripiposurodabem.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/f3e441d12ac6b9029f68527353d3c938/xabozubodovubezipexaxuni.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608596565ec87---zowejamevikevapirozibex.pdfIn PDF document text
- http://haithuanphat.com/uploads/files/66170727765.pdfIn PDF document text
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608581c2729c4---2794522925.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_off0000e89f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE89F	17764 bytes
SHA-256: `f8db566b42f64180c4947b70bb58fce74b988f26691ece729edbff0db173ce57`
`font_01_sfnt_off000116a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116A7	10680 bytes
SHA-256: `efde7d4655bb3f68e4898b11964d64d5b3fe68597abee2610d4b723d7f5428a3`
`font_02_sfnt_off00012ef6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EF6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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