PDF malware analysis — malicious · 69308051f22bcdd6

MALICIOUS

PDF

97.3 KB Created: 2021-09-08 14:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 42d3fd0e6a80f5c7a3aac834a7b9df6d SHA-1: d560dce9bbde162369aaa4a13c33092e453fec9f SHA-256: 69308051f22bcdd6c98f13d90d45eb02ed89b9c95e689b8fc9eaf327a4c0d2eb

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, suggesting it functions as a lure to redirect users to potentially harmful websites. The PDF structure and embedded links point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9926

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 https://garglob.ru/uplcv?utm_term=hsk+level+2+past+papers+pdf PDF link annotation
- https://premiersuli.hu/files/files/86001500779.pdfIn PDF document text
- http://littlepearlspublishing.in/data/eimages/file/dirapowukipifom.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/48207077976.pdfIn PDF document text
- http://madmojo.com/fckupload/file/94392604004.pdfIn PDF document text
- https://hkpefa.org/editor_upload/file/giliguwarolukoduj.pdfIn PDF document text
- http://hnc2.com/userfiles/file/50380272492.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613626a18dc00---gefazawababojug.pdfIn PDF document text
- http://veoguidecostarica.com/ci/userfiles/files/kaparitowojaguwerumutu.pdfIn PDF document text
- https://ispartaprefabrik.com/ckfinder/upload/files/22081046555.pdfIn PDF document text
- http://sgpeo.pl/users/file/xusidel.pdfIn PDF document text
- http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28578726672.pdfIn PDF document text
- http://jodhpurheritagewalk.com/images/file/6326836367.pdfIn PDF document text
- http://astmasme.com/userData/board/file/nabisinuwofonusosijozag.pdfIn PDF document text
- http://rulada.by/upload/editor/files/wowumazaxelek.pdfIn PDF document text
- http://korea-labels.com/ckfinder/userfiles/files/retiseveb.pdfIn PDF document text
- https://transdeliveris.lt/userfiles/file/nasejelijoroduli.pdfIn PDF document text
- https://smshealthcareservices.com/ckfinder/userfiles/files/72859794654.pdfIn PDF document text
- http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/37251372774.pdfIn PDF document text
- http://naszymsladem.pl/upload/file/75218508516.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/6443aad5184c62475edeb6b876726684/31599662061.pdfIn PDF document text
- https://novamakine.com/upload/ckfinder/files/11141439719.pdfIn PDF document text
- https://reazfarah.com/ckfinder/userfiles/files/jonototukujiz.pdfIn PDF document text
- http://terfigyelokamera.info/files/file/seroromav.pdfIn PDF document text
- http://kimbuunguyen.com/uploads/userfiles/file/9725147992.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000102f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102F0	1680 bytes
SHA-256: `6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc`
`font_01_sfnt_off00010aec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AEC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000122fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122FE	22368 bytes
SHA-256: `f38520071c015c15cb4dee1d29f79735749017fbf088d4c6b1ed9f66c8c01de1`
`font_03_sfnt_off00015d7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15D7D	10444 bytes
SHA-256: `c892cbd28f161d5b58fc03aa17053cb1c436a423143f1e217e2d4ff337bc1316`

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