PDF malware analysis — malicious · 249c9a002025c343

MALICIOUS

PDF

82.7 KB Created: 2021-09-18 01:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: fb59831a30c2ff1206dd33d58d7c5038 SHA-1: a103ede967a4be8ab96f72ba4047d2070befac63 SHA-256: 249c9a002025c343271ab0e68041b8b77a02decb10a8b9449bc6d196dfc8a614

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to redirect users to malicious content. The presence of a 'utm_term_redirector=True' parameter in one of the URLs further supports the phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

Heuristics 5

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.
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://k12kos.com/ckfinder/userfiles/files/74867245762.pdf In PDF document text
- http://gespk.com/userfiles/file/24819302538.pdfIn PDF document text
- http://maslatalaia.com/userfiles/file/judelogajasupuxa.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a117daaac0---levapeguxotumatenuxi.pdfIn PDF document text
- http://e68momo.com/shopadmin/upload/files/gawedumujafoponasi.pdfIn PDF document text
- https://hobbes-group.com/upload/files/nafavadudalajeduxigatef.pdfIn PDF document text
- https://inprovitbrasil.com/ckfinder/userfiles/files/rovekasujemomo.pdfIn PDF document text
- http://bluekeydigital.com/images/pic/file/vamogujer.pdfIn PDF document text
- http://rootbeadmill.com/upload_fck/file/2021-9-7/20210907072845152197.pdfIn PDF document text
- https://grup-insaat.com/userfiles/file/lejasazebas.pdfIn PDF document text
- http://aristosaigonhotel.vn/uploads/files/62551095904.pdfIn PDF document text
- https://gamepinleri.com/calisma2/files/uploads/3456719908.pdfIn PDF document text
- https://icoachyou.biz/images/ckeditor/files/jiwatexakokakuv.pdfIn PDF document text
- http://asupuro.com/user_data/image/file/lasojirodilekedazivivet.pdfIn PDF document text
- http://ciskmv.com/css/file/pakipobutatugu.pdfIn PDF document text
- https://arch.ua/ckfinder/userfiles/files/rakojoxekali.pdfIn PDF document text
- https://aramlasmerok.hu/uploads/file/lapumowitarumadugomemupu.pdfIn PDF document text
- http://unixsensor.com/uploads/files/202109091204415007.pdfIn PDF document text
- http://shsuorui.com/uploadfiles/fckeditor/20210902/file/16305514883970.pdfIn PDF document text
- http://quaint-house.com/images/blog/file/96168134251.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134877951e3a---65716428815.pdfIn PDF document text
- https://linhngapt.vn/upload/files/30590354140.pdfIn PDF document text
- https://dolaodong.com/userfiles/file/36223687776.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=fortnite+gpu+fix+apk+downloadPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bc77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC77	21448 bytes
SHA-256: `55d1eec1a1283e365b95c35a8f75de0ec89de98a114407f74ca06dabf726a604`
`font_01_sfnt_off0000f38b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF38B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010b9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B9C	16244 bytes
SHA-256: `fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d`
`font_03_sfnt_off0001218b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1218B	10860 bytes
SHA-256: `6551f9d69ff92f5ab5af888dbaf6ad7f162efa4c971395d205d7837f6d362bcf`

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