PDF malware analysis — malicious · b88a2d78900098f6

MALICIOUS

PDF

83.5 KB Created: 2021-09-19 08:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 4dd5e0dc51747a938d9bb8ed0e11a8d4 SHA-1: 6de93a71c13af3111aea40ef189bea25bf5c3bf9 SHA-256: b88a2d78900098f6a722d069fd1ec448d824be03bf427d22b578f0f5f8768e28

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common method for initiating malicious actions within PDF documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://crewmak.ru/uplcv?utm_term=android+hide+apps+in+secure+folder PDF link annotation
- http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/xurakunimusima.pdfIn PDF document text
- http://kxqcgs.com/filespath/files/20210902111754.pdfIn PDF document text
- https://www.solucionaesp.com/ckfinder/userfiles/files/22757274871.pdfIn PDF document text
- http://gasasosong.com/upload/fckeditor/file/wazevotifozuverolevo.pdfIn PDF document text
- http://owv-sad.de/userfiles/files/14989543512.pdfIn PDF document text
- https://www.stnedu.com/ckfinder/upload/files/66181638781.pdfIn PDF document text
- http://gorod-r.com/userfiles/file/pajujakolinedarobuwituzi.pdfIn PDF document text
- https://bahia-group.com/ckfinder/userfiles/files/3966213521.pdfIn PDF document text
- http://amandatour.ru/js/ckfinder/userfiles/files/leninileximanufavumuzeke.pdfIn PDF document text
- http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/getidodiwibo.pdfIn PDF document text
- http://closehorses.com/userfiles/file/fomowanebikotogati.pdfIn PDF document text
- https://walnutcreekguide.com/wysiwygfiles/file/kosinelivevesotape.pdfIn PDF document text
- http://hnfhdc.com/UpLoadFile/2021091816594327595.pdfIn PDF document text
- http://garderoba.sk/images/_file/nexasivenasovafolinor.pdfIn PDF document text
- https://rallstarawards.us/nbloom/fckuploads/file/bumimetarobo.pdfIn PDF document text
- http://cameranichietsu.com/luutru/files/tefadowuwoxotaxif.pdfIn PDF document text
- http://festacreativita.org/userfiles/file/jurimufux.pdfIn PDF document text
- http://tatnhapkhau.com/ckfinder/userfiles/files/24328046983.pdfIn PDF document text
- https://electrodomesticaruano.com/images/ckfinder/files/22241221071.pdfIn PDF document text
- http://clairerolo.com/userfiles/file/51452771396.pdfIn PDF document text
- http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161333f8524388---38514762866.pdfIn PDF document text
- https://faresaldabbous.com/uploads/files/kodudewunikefufonin.pdfIn PDF document text
- http://studiotecnicopinto.it/userfiles/files/dobubejafowibetewub.pdfIn PDF document text
- https://zenithoverseas.com/assets/userfiles/files/22999288749.pdfIn PDF document text
- https://swiz.eu/files/editor/labojakejanakafiburivaji.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_off0000e126.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE126	17632 bytes
SHA-256: `36adf5b60d177ea76419a787dd3b0644149e7420c124497cd031fcf06c079ebc`
`font_01_sfnt_off00010f4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F4D	10700 bytes
SHA-256: `b16e991d0b27fae43e974d079fcab3a68c4eb7c3f461d619f9aeea648c8e97ff`
`font_02_sfnt_off000127c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127C2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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