PDF malware analysis — malicious · 4312efa76b15870f

MALICIOUS

PDF

73.5 KB Created: 2021-01-11 10:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 2a3e451da9cd1d01361299f559b6fa56 SHA-1: 3c3c8924e7d1b46a04926fb348c2e7ee99910e94 SHA-256: 4312efa76b15870f7b9fd5dab45ec215a98af7f5f9dac27dac487116e4da8455

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The embedded URL `https://trafffe.ru/123?utm_term=spectrum+tv+remote+volume+not+working` indicates a lure related to technical support for a TV remote, likely to trick users into visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 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.
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://trafffe.ru/123?utm_term=spectrum+tv+remote+volume+not+working PDF link annotation
- https://cdn-cms.f-static.net/uploads/4387406/normal_5f9201f4bf396.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447433/normal_5fa3d349b3342.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4415739/normal_5fce4fd7d7657.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4463277/normal_5feda33de9595.pdfIn PDF document text
- https://jibisovewa.weebly.com/uploads/1/3/4/6/134653871/1487697.pdfIn PDF document text
- https://cdn.sqhk.co/rojarasam/e1Yigjb/download_meetme_application.pdfIn PDF document text
- https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/bugufanulanop_vopepogelu.pdfIn PDF document text
- https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/konifidad_gajomola.pdfIn PDF document text
- https://pukefigagarit.weebly.com/uploads/1/3/1/4/131406744/kanafixevuxamor_vepiveseramo_fubokup.pdfIn PDF document text
- https://site-1180237.mozfiles.com/files/1180237/ninifofosulozela.pdfIn PDF document text
- https://site-1235873.mozfiles.com/files/1235873/free_powerpoint_professional_templates.pdfIn PDF document text
- https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/f8e1882.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418188/normal_5fdc63881497f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484812/normal_5ff65d0433be5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370529/normal_5fd79caced7be.pdfIn PDF document text
- https://cdn.sqhk.co/purovufizu/evogfjj/xizidobemovexetis.pdfIn PDF document text
- https://kexowepapu.weebly.com/uploads/1/3/2/8/132815076/676141.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
- 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_off0000d565.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD565	5068 bytes
SHA-256: `f71a194a6e5a2eab710e266b850bf13e6359b658495401db79a77abe2acedccd`
`font_01_sfnt_off0000e6a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6A5	10548 bytes
SHA-256: `9fdb78d054c397da255849485121856dd0e4708714c89b1d48bf8f954461c7a4`
`font_02_sfnt_off00010ab6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AB6	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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