PDF malware analysis — malicious · 1e4fabd8b39659ec

MALICIOUS

PDF

80.2 KB Created: 2021-03-20 21:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 9dce20e0a28a97baf68a63caa5832f33 SHA-1: b283713a56367040c4911b1561a3ea1f1a95a014 SHA-256: 1e4fabd8b39659ec34fce72cd158a2afd5975e34986544cfa4e46778507ce764

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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 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://resalured.ru/aws?utm_term=gmat+preparation+time+required PDF link annotation
- http://metalllift.ru/new_naked_celebso7tmt.pdfIn PDF document text
- http://masalev.ru/961940269381grr6.pdfIn PDF document text
- http://formblckr1.xyz/63650470519jqmro.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416514/normal_600aaec8bc184.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495860/normal_5ff33970aad3c.pdfIn PDF document text
- https://cdn.sqhk.co/butiluluvuk/g2iluhi/20732270930.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421641/normal_6046809015885.pdfIn PDF document text
- https://nebelifufenav.weebly.com/uploads/1/3/1/4/131437331/laxebunipage.pdfIn PDF document text
- https://mamudige.weebly.com/uploads/1/3/0/8/130874639/jojopixonap-vesewewonowebez-fetopulak.pdfIn PDF document text
- http://verokunutez.22web.org/wajipukokuxonodazalije.pdfIn PDF document text
- https://cdn.sqhk.co/sunawopi/cggm2hg/hd_video_player_pro_apk_cracked.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474750/normal_5fe029cf1ff1e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379487/normal_605316f432c5a.pdfIn PDF document text
- https://jejofiwapo.weebly.com/uploads/1/3/5/3/135312812/2334076.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4385028/normal_5fcaca5d928af.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500187/normal_602ba1378a6e6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4490746/normal_5fcecf3ed9faf.pdfIn PDF document text
- https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/99b06f930171.pdfIn PDF document text
- https://cdn.sqhk.co/japewaturu/iWzihpE/ben_10_alien_experience_gameplay.pdfIn PDF document text
- http://sdfsdfsdf.shaketorch.com/84841236742.pdfIn PDF document text
- https://cdn.sqhk.co/bupewazadufa/hgVtUoV/24149567211.pdfIn PDF document text
- https://zobagitolofoxaz.weebly.com/uploads/1/3/0/7/130739917/5657262.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370541/normal_5ff5c389e6394.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://miloritamuve.rf.gd/68873810440.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fa2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA2E	5052 bytes
SHA-256: `62a6ecf14fa38abd3d38bf713ce93c130bf42b0f5ebd1fa805d7050e39093b3a`
`font_01_sfnt_off00010b45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B45	11752 bytes
SHA-256: `eca06496a56f030ab91a87a0a4688f1be80060172ef1069069c680ba70679ac1`

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