PDF malware analysis — malicious · 487c064a6a32e9bf

MALICIOUS

PDF

75.7 KB Created: 2021-09-01 12:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: f47822831670fa6422a910d1aca4abf3 SHA-1: 39a4aecceb3e35028fa53fd71640ef2a20d99a24 SHA-256: 487c064a6a32e9bf1f63df40bff365f80bf9f682dcbbfcbffe74a857a3ac0139

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous links, many hosted on compromised CMS upload storage or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be non-readable content generated by wkhtmltopdf, rather than user-facing text.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://accronline.com/userfiles/file/vulagigawula.pdf In PDF document text
- https://tractorpulling-emmeloord.nl/upload/file/36289567643.pdfIn PDF document text
- http://bellsazshihtzu.com/clients/878694/File/zirusejopugokonasorewijim.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/d1083497585f4420d1ed986f1ba6f09f/38803920158.pdfIn PDF document text
- https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092aab29e8f5---84205120883.pdfIn PDF document text
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/cd84d7a59e9a652907a0316c8ff3d433/25769421522.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610545af4d8cf---84590723714.pdfIn PDF document text
- http://engineersclasses4competition.com/files/others/49763130195.pdfIn PDF document text
- http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59ec7e15c---rikokurusedozajeriguk.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160baba4fcb461---97454565622.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608846ef3242b---72639923605.pdfIn PDF document text
- https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/tavi78vk3hlpq0n864if3l8uj7/fowimozamig.pdfIn PDF document text
- http://x-site.by/upload/editor/files/71743471684.pdfIn PDF document text
- https://gregor-biffiger.ch/userfiles/file/bojomas.pdfIn PDF document text
- http://akinmedical.com/uploads/file/43657547175.pdfIn PDF document text
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c418e20ba04---22417665893.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/310b6d863782d3ce5c21927f49a9560c/7077952865.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/39670124693.pdfIn PDF document text
- https://bestwaynepaltrek.com/ckfinder/userfiles/files/66981697011.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077db03d51bb---98552835930.pdfIn PDF document text
- http://eurekaelearning.com/upload/news/file/fekuludofexiruxotupulewuk.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/3dc5b3f8c4d36ee4e8dbfee6eea1b884/nibakapawosozemonokejiso.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/fc4f85acfdc9e3b80dacc52dcd265f10/xuxatozo.pdfIn PDF document text
- http://davidhammerstein.org/userfiles/file/lurumenuxabafoxiwige.pdfIn PDF document text
- https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f462a0a375db36e6041503c936c83a6b/kagujorugafalirun.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+give+breast+milk+in+bottlePDF 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_off0000c6e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6E5	15660 bytes
SHA-256: `250f32657b20cd68eb21c036aa60f67cb9ff1d2b8703f6a5d8227f3c08482e45`
`font_01_sfnt_off0000ee9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE9B	10828 bytes
SHA-256: `9c2b160ec9d35c89e82c1aeed0f917217775c6550b53ca3c6d4d22a07af3f6fd`
`font_02_sfnt_off0001079e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1079E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.