PDF malware analysis — malicious · 4b893abe8776d995

MALICIOUS

PDF

82.5 KB Created: 2021-09-16 15:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: b1128197fae2c875ed850ca2ff00db07 SHA-1: f3f204efee14871e90306262114b9610efeda370 SHA-256: 4b893abe8776d995056f382647552a66d6c074461ea22b522e463a7e6ee12f1b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, including one pointing to a suspicious domain that appears to be a link farm. The presence of external URIs and the overall detection suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://crysiq.ru/uplcv?utm_term=art+of+war+mod+apk+unlimited+gems PDF link annotation
- http://thermogroup.ru/uploads/files/datofatebefanabowafi.pdfIn PDF document text
- http://suncitygroup.ir/basefile/suncitygroupir/files/16499917014.pdfIn PDF document text
- https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/woretil.pdfIn PDF document text
- http://vincentianssjp.com/userfiles/file/mojopijidawibekifo.pdfIn PDF document text
- http://jyczgj.com/UploadFiles/file///2021090506055098.pdfIn PDF document text
- https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/23642182772.pdfIn PDF document text
- https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/10433656688.pdfIn PDF document text
- http://olech-rzeszow.pl/userfiles/file/85274479177.pdfIn PDF document text
- https://equantumconsulting.com/files/files/32880648479.pdfIn PDF document text
- http://koovappadyscb.com/ckfinder/userfiles/files/zumikowasuselofepaxu.pdfIn PDF document text
- https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/60684639261.pdfIn PDF document text
- http://chip-chup.hu/upload/file/84721310896.pdfIn PDF document text
- https://www.tocbirsen.org.tr/ckfinder/userfiles/files/92344361212.pdfIn PDF document text
- https://collinite.pl/userfiles/file/29125932447.pdfIn PDF document text
- https://thic.net/plugin/ce1/ckfinder/userfiles/files/xezevimogivimuvimago.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136e727ab30f---weloxosas.pdfIn PDF document text
- http://gearcon-eng.com/file_media/file_image/file/nozosekuze.pdfIn PDF document text
- http://benthanhsgfarm.com/images/uploads/files/25433506453.pdfIn PDF document text
- http://huarui-bio.com/upload/files/28532997396.pdfIn PDF document text
- https://alpinashop.rudy-ra.com/files/gitubifixibitogigevose.pdfIn PDF document text
- https://arendic.cl/files/lofewilujalomoto.pdfIn PDF document text
- http://dlugopis.kbo.pl/ckfinder/userfiles/files/35300388224.pdfIn PDF document text
- https://vinocastillo.hu/editor_up/92602912585.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16141159816799---vuwimobok.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_off0000dc90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC90	17712 bytes
SHA-256: `7367ea44e6f736f64fa79132ce133aa69bfebef2908642ba192c9d4c3c0dd76d`
`font_01_sfnt_off00010ac2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AC2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000122d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122D9	11100 bytes
SHA-256: `b018e1a6aab98f586b6932775a9975ac968c41c899097e1621b3632026a6e770`

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