PDF malware analysis — malicious · 028701067bb471a5

MALICIOUS

PDF

80.0 KB Created: 2021-03-27 11:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 793aec91c6e8889a09f238c712c9f7d1 SHA-1: dbd0407f62ce60d086f8425ba78eecf36db27387 SHA-256: 028701067bb471a57ba9770d31f4387b11e3f4495f6b9f1405b370775f72a834

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to trick users into downloading files. The presence of a 'call of duty mobile apk' in a URL indicates a lure for popular software. ClamAV detection and ML classification further support its malicious nature. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://kuzutuzo.ru/123?utm_term=call+of+duty+mobile+apk+obb+file
- https://vuzeruferule.weebly.com/uploads/1/3/4/5/134591890/fisubafajijin.pdf
- http://fodefon.getenjoyment.net/wubipagurodosire.pdf
- https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/7457ab1.pdf
- https://zavowajasobi.weebly.com/uploads/1/3/1/4/131406950/36ddf473ad1.pdf
- http://rujurag.22web.org/vazum.pdf
- https://wevapagavum.weebly.com/uploads/1/3/4/3/134306171/43227.pdf
- https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/1198299.pdf
- http://medesutaduj.22web.org/puporalitojaladaz.pdf
- https://nopiviwefimak.weebly.com/uploads/1/3/4/7/134708781/32bd7af988d.pdf
- https://wozijosetat.weebly.com/uploads/1/3/1/4/131407158/rigewasagugil.pdf
- http://sepotutudi.iblogger.org/vomowejelu.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- http://muxosuzu.rf.gd/abc_physics_book.pdf
- https://uploads.strikinglycdn.com/files/8b45d52a-88b7-4882-bf0e-795c819c3a6c/53251260366.pdf
- https://uploads.strikinglycdn.com/files/32f4121f-4b7c-431b-b749-9d9b428a238f/weider_pro_4950_exercise_guide.pdf
- https://uploads.strikinglycdn.com/files/853caa3b-068d-4cbc-a8d3-abe7982eecac/how_do_i_create_a_rental_agreement.pdf
- https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_44c6b59a4e5f4786bf7b7d98aa84e1b9.pdf?index=true
- https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_9043e0951a0e422880d46bc38200b16e.pdf?index=true
- https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_3b3cec37ce124cfb8afa0b4ba7232cc7.pdf?index=true
- http://furipurisebete.onlinewebshop.net/sademobosodekevu.pdf
- http://fexotupakel.rf.gd/43307113676.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec08.bin` `0814e72d7114f65960488a2b2f56c5eb85fbbd96279a518486e7206adec29fe8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC08	5016 bytes
`font_01_sfnt_off0000fd3c.bin` `1c309ad624dbd920f02cbf536532a229f0507902ab5b32b970982c1bfdbbc5dd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD3C	11628 bytes
`font_02_sfnt_off00012485.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12485	4324 bytes

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