PDF malware analysis — malicious · 9cb0c839b26f74fb

MALICIOUS

PDF

89.2 KB Created: 2021-06-27 06:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: dfb93b56f50ed64c322272c118a724ed SHA-1: cb2c744a69aef0019a7f3bd8d69660ac6a412a09 SHA-256: 9cb0c839b26f74fbc972aab19a1712730c5bd4e0937b3556e3fcd9e30320428f

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, potentially leading to further malicious content or exploits. The presence of an 'enable lure' heuristic indicates the document likely prompts the user to enable macros or editing, a common tactic for malware droppers to bypass security measures and execute their payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f5206ba4ff85a97068ba122cc17af0a7/78651956403.pdf In PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acdc966339d---zuvuko.pdfIn PDF document text
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/5d3cdc6ffa86ded47acc02a760315193/4647776280.pdfIn PDF document text
- http://macabrey-luthier.fr/data/Files/nubokaxalisezuxupew.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/lifizexuduzowekoxarud.pdfIn PDF document text
- http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/kugojidov.pdfIn PDF document text
- http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/56cdf6f5a3053451ff845d101816a42f/61955750225.pdfIn PDF document text
- http://studiotecnicobergamaschi.it/userfiles/files/kubedujopimisosesasuw.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/86699790868.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/t6pdcg3r0jkr2bkigc2tqopif5/80482621046.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609be25d7ca48---fewuxajipoburexunigewew.pdfIn PDF document text
- http://dianacb.cz/userfiles/file/13411153087.pdfIn PDF document text
- http://yakutiaprime.ru/SITE/files/editor/file/jusuvikelo.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/69bcaad872f383cb822585a6150c9909/letigowoxopexiguxefi.pdfIn PDF document text
- https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/23450fcc58c04f8b06c4ca084d910b7f/kogeropovisagaxebawos.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/n2fp113eiumh560a08fpdk0286/62130416006.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/d42b8d479200b1cd165da264d0ffff05/32059191611.pdfIn PDF document text
- http://geyikkimya.com/userfiles/upload/file/77606058008.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608da38298883---voxamusedavemuxab.pdfIn PDF document text
- http://naturallabs.de/userfiles/file/73427040964.pdfIn PDF document text
- http://spreewaldatelier.de/img/editor/file/difagepawuzirexefikog.pdfIn PDF document text
- https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7636a422a7---powidibasiwur.pdfIn PDF document text
- http://asupuro.com/user_data/image//file/koripedixamuxajem.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffdd850031---40183446974.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/cad5e7d3e39f07882161af1cb985740c/fajog.pdfIn PDF document text
- http://i-daa-wl.de/userfiles/bojaselevizanu.pdfIn PDF document text
- https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/g88vtotkhtndljvhgs15bbjcd2/59592360334.pdfIn PDF document text
- https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/8ae4c863c6cf58b6dd071e8f244f211c/xujigoxijolutofo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=alternatively+activated+macrophagesPDF 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_off0000f79e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF79E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010fb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FB5	11124 bytes
SHA-256: `75ff3d50a33c87cba6c19c62069347e462d5fa35a9bef646f625b8a578e4b5fa`
`font_02_sfnt_off0001294c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1294C	17564 bytes
SHA-256: `3256402ef8610a77fc5412a5dc93c5f046faff25c78178fb7eb173395f6fa365`

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