PDF malware analysis — malicious · 45be8ccca64fda9c

MALICIOUS

PDF

82.6 KB Created: 2021-09-22 23:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 39ea59b3bd55cd0e0f3ae242f4e28505 SHA-1: dbb4013afe1bc4fedc76ae8a30b49dc30a15b774 SHA-256: 45be8ccca64fda9c6ebd848e803dfd4a4aa393b95e7d01b036c89df8fa04bf20

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer, likely to facilitate further exploitation or redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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 http://amindoost.ir/images/upload/files/27508651760.pdf In PDF document text
- https://cafeau1ait.xyz/js/ckfinder/userfiles/files/21437797186.pdfIn PDF document text
- http://nawaress.com/webroot/js/ckfinder/userfiles/files/7016371083.pdfIn PDF document text
- https://rpdev.org/ckfinder/userfiles/files/54544413894.pdfIn PDF document text
- http://watchimport.eu/userfiles/file/29071624514.pdfIn PDF document text
- https://santa.sg/images/users/00000000/files/60251844034.pdfIn PDF document text
- http://bobiniauto.com/userfiles/file/69957884883.pdfIn PDF document text
- http://eros-arena.com/eros/userfiles/file/dupikod.pdfIn PDF document text
- http://www.clc-engineering.com/siteuploads/editorimg/file/veruvupibiradiratufonex.pdfIn PDF document text
- http://diplomat2014.ru/ckfinder/userfiles/files/nuwanupalakodij.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/jiwubugoz.pdfIn PDF document text
- http://dongsimkindergarten.com/upload/files/zimalipotalamusojep.pdfIn PDF document text
- https://mayphotocopydogia.com/upload/files/wowowikenusoju.pdfIn PDF document text
- http://www.astmalek.cz/obrazky/file/89012816919.pdfIn PDF document text
- https://cosplay-expo.it/ckfinder/userfiles/files/lesidegijapifo.pdfIn PDF document text
- https://a1-recruitment.fr/v2011/Files/fck_upload/file/43354596598.pdfIn PDF document text
- http://ankurgroups.com/userfiles/file/25801937252.pdfIn PDF document text
- http://medianet2000.net/amm_prod/image_news_popup/file/46484482149.pdfIn PDF document text
- http://saltokisport.com/uploads/files/70549101879.pdfIn PDF document text
- https://ilonew.tasksplan.com/userfiles/files/lumaxagoreri.pdfIn PDF document text
- http://www.sanjuktabanerjee.com/fckimages/file/95030523426.pdfIn PDF document text
- http://highdeal.linkeo.net/ckfinder/userfiles/files/letokadatumufanivemavip.pdfIn PDF document text
- http://nasfthr.com/userfiles/file/lukenuribilerikubozo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=principles+of+marketing+south+asian+perspectivePDF 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_off0000dd08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD08	11184 bytes
SHA-256: `48579c147c187c9c2c7180173dd45aced25601082ee7d0cc22f32370ed51c9c0`
`font_01_sfnt_off0000f708.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF708	17540 bytes
SHA-256: `5fe39a4bb94fdf7682f79c537267cc20de7abc47c0828c75895a165526988ff7`
`font_02_sfnt_off0001247f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1247F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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