PDF malware analysis — malicious · 70c5c38dbb2c5e86

MALICIOUS

PDF

74.3 KB Created: 2021-09-07 02:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 196306b77a89543779a113c137ea4b55 SHA-1: a2755754c06b3310d53706854719def016aeee77 SHA-256: 70c5c38dbb2c5e861b9183b25f611676b423ca27180694b30cb3877e07ecf8e7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing campaigns.

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://ketchas.ru/uplcv?utm_term=php+flatten+pdf+form PDF link annotation
- http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/xevosunowojegafus.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/39109170478.pdfIn PDF document text
- http://tumwebthailand.com/ckfinder/userfiles/files/18711278341.pdfIn PDF document text
- http://global-insurance-broker.de/downloads/luwerasidapopikodosusuzoj.pdfIn PDF document text
- http://architetturaurbanistica.it/userfiles/files/29089561908.pdfIn PDF document text
- http://studioassociatoemc.com/userfiles/files/tekoriniwemokexo.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd32cdb64a---babiv.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a48721c09cb---90188470127.pdfIn PDF document text
- https://maximatrimony.com/ckfinder/userfiles/files/7807851978.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d82ec7937f3---sujinireveluvuji.pdfIn PDF document text
- https://bda.ch/ckfinder/userfiles/files/23219796425.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/644b37d23a99e2abbbd10cdf24f73e68/pamaxorupetipirivezinowu.pdfIn PDF document text
- http://traktorpulling.de/ablage/userfiles/files/53556374633.pdfIn PDF document text
- https://homeuu.biz/upload/ckeditor/pages//files/26768162503.pdfIn PDF document text
- http://ithaca1960.com/clients/8/87/874e400c25abfb160fd1c0cf9913fcd0/File/japopapuzivabuwabori.pdfIn PDF document text
- http://lamorenj.com/userfiles/files/somisolanekozegixixuf.pdfIn PDF document text
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9ecd5cb1b---lukimodo.pdfIn PDF document text
- http://homelife-superstars.com/image/files/50808257278.pdfIn PDF document text
- http://blfimmobiliare.com/userfiles/files/pufexizupi.pdfIn PDF document text
- https://luminex.pl/upload/file/sotaxegusatuzomomilaruj.pdfIn PDF document text
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5e928dc8b---78841797436.pdfIn PDF document text
- https://hzautomatisering.nl/userfiles/file/xenasonokof.pdfIn PDF document text
- http://ikitellirezistans.com/upload/files/52303772726.pdfIn PDF document text
- https://biholka.cz/uploades/userfiles/file/95045168500.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9998c2d15---30851768573.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_off0000be55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE55	17420 bytes
SHA-256: `f5f2cdf4e304796e7c5e8e9f85bcec4e2098782b2229158a4eda5645d6b5e7d9`
`font_01_sfnt_off0000ebe3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBE3	10504 bytes
SHA-256: `1583f70c2f6773ebc454f011e9bfda14f74344e3289f37f24e8377f2b6ee7ade`
`font_02_sfnt_off00010393.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10393	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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