PDF malware analysis — malicious · 4d32e1b1850e7109

MALICIOUS

PDF

96.0 KB Created: 2021-09-02 11:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 8e4206bbd2dcf312767849559d9316df SHA-1: 74ef1f518a56105f9aafdd504429bf4b141cdb13 SHA-256: 4d32e1b1850e7109f01b70385d2192016235aa7af734fce90d42b2d1c7d9b51c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

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.
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://drafthe.ru/uplcv?utm_term=rhinoceros+5+tutorial+pdf PDF link annotation
- http://duonglaohanoi.com/userfiles/file/lesarogamibewusedewuwun.pdfIn PDF document text
- http://skogsformedling.se/bilder_umeny/File/xivivunaxefirolutexezedu.pdfIn PDF document text
- https://chetanaus.org/bheru/uploadfiles/file/bogefigapotimopumo.pdfIn PDF document text
- http://delannahotel.com/user_img/file/70766223165.pdfIn PDF document text
- http://www.deco-interieure.com/userfiles/file/wisugozigawager.pdfIn PDF document text
- http://tsradviseurs.nl/mailing/images/photo/file/48748347416.pdfIn PDF document text
- http://orhs76reunion.com/clients/30721/File/62593201736.pdfIn PDF document text
- http://ozhelalikram.de/resimler/files/57229676516.pdfIn PDF document text
- http://execdentalclinic.com/uploads/ckfinder/userfiles/files/perubus.pdfIn PDF document text
- http://radio-salsa.com/php/rs/filesupload/file/24028649184.pdfIn PDF document text
- https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3171bed2---91741065068.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/f57713905b7229d57281e186bd9a3a57/rusapedazowimatasad.pdfIn PDF document text
- https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/bvbpo3mgen4qaeulb5ruohthge/65956415947.pdfIn PDF document text
- http://viethanit.vn/hinhanh/file/53016559769.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088dbbcbede2---nukexebufanupovij.pdfIn PDF document text
- http://3asoft.vn/img/files/18644837769.pdfIn PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/0331a2fb998950bca0e5a712e6eda625/69010857834.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d042dd522a---56069078457.pdfIn PDF document text
- https://beruanglucu.com/contents//files/74452816876.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6d29a227e9cd629d956801802d079551/ragazusifokotuw.pdfIn PDF document text
- http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/97640826665.pdfIn PDF document text
- http://duancanhotot.com/upload/files/kozozefi.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fe74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE74	10996 bytes
SHA-256: `44ddba9213ed8351c072557309d5e45b319dee903db02b612a0cc1fae0b00d0a`
`font_01_sfnt_off000117f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117F2	22528 bytes
SHA-256: `69f689edef9cf22529e20646bb4631b6d9fe72bb2c03717e78df8d6418409ca7`
`font_02_sfnt_off0001504d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1504D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001685a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1685A	2140 bytes
SHA-256: `527a722eb0913e795f97e7498212729d43f9c1f796da52295cb5bf8973a1b017`

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