PDF malware analysis — malicious · 68b7eaa21091f2d6

MALICIOUS

PDF

82.3 KB Created: 2021-03-22 07:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 2e39d873c14e8c8c86baf497d1571242 SHA-1: c1b74f7dfc1d7fde495e0da3bda03384cd92369e SHA-256: 68b7eaa21091f2d648e02376327d21af17d6b013facf41749cffe2b61dceb76f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'constant mesh transmission explanation'. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=constant+mesh+transmission+explanation PDF link annotation
- https://static.s123-cdn-static.com/uploads/4414360/normal_60093112d3cc9.pdfIn PDF document text
- https://cdn.sqhk.co/vumuwuxa/RggB4lh/bubble_shooter_2_panda_mod_apk.pdfIn PDF document text
- https://cdn.sqhk.co/pixisuja/hhnhOgi/28129368366.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488329/normal_6045e8d0ba823.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405420/normal_6025bf685334a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365542/normal_5fee50e5ad10e.pdfIn PDF document text
- https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/lepej.pdfIn PDF document text
- https://datugabow.weebly.com/uploads/1/3/4/7/134745554/nipafagiv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501989/normal_6048c676cbf69.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448551/normal_5ff3220344669.pdfIn PDF document text
- https://cdn.sqhk.co/liwifetil/eULR7xE/23984549511.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379369/normal_601d786c73e55.pdfIn PDF document text
- http://tradestaroffice.com/stack_on_22_gun_security_cabinet_for_sale7yr0f.pdfIn PDF document text
- http://banki-internetowe.com/jurowobuwugabexwjgvs.pdfIn PDF document text
- https://lakofanagobogan.weebly.com/uploads/1/3/5/3/135386994/03c6a.pdfIn PDF document text
- https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/nuwikukejojot.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/a4384a11-7cb0-4433-a8b3-7f4deb7fd99d/formato_de_perfil_de_puesto_ejemplo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e166107e-f8e8-4184-855e-7b6e9faec5f1/senudav.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b56c3e94-e2ba-4791-b247-db3fabf0acdf/29151975712.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/46b25845-7f71-40ca-ace9-977d74d4c8d2/understanding_by_design_lesson_plan_math.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/650c5c95-17da-4a59-9ce8-02b53ed6a51a/dibit.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fa11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA11	4940 bytes
SHA-256: `1913166722a0fdce08d13b9135141237216b31c560cb52f21a337d3b0436d9d5`
`font_01_sfnt_off00010aa2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AA2	10120 bytes
SHA-256: `33e6b86a704d1c44660b5b17f002ac5aa8d776ca081011fd9586934fca75ab86`
`font_02_sfnt_off00012d5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D5D	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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