PDF malware analysis — malicious · 2f9fade16d8bc471

MALICIOUS

PDF

89.9 KB Created: 2021-03-23 05:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 8b1185c4e4c5bfea509a1de2245b22ad SHA-1: 1adc3d88334b3ddd082d595fcc999986a44974ee SHA-256: 2f9fade16d8bc47145a87cde0ea9fbc2036a144e7f51e20ddb0177742c002acc

66 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs that point to suspicious domains, including one that appears to be a link farm designed for SEO manipulation. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 4

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://pelibifir.ru/strik?utm_term=how+to+answer+describe+your+customer+service+skills PDF link annotation
- http://lovelatu.iblogger.org/vazupepobefisibu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473632/normal_60450a46a1352.pdfIn PDF document text
- https://majemuxisirilud.weebly.com/uploads/1/3/4/7/134719568/4120618.pdfIn PDF document text
- https://zejenabo.weebly.com/uploads/1/3/0/9/130969472/4409771.pdfIn PDF document text
- http://sejerodetupumil.medianewsonline.com/objective_banking_awareness_questions.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369656/normal_60183028928a7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383805/normal_601df9bf17ab6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4859805/normal_6055b1c26a14c.pdfIn PDF document text
- https://rokumipizo.weebly.com/uploads/1/3/0/7/130776068/zexuna.pdfIn PDF document text
- https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/divigojiz.pdfIn PDF document text
- http://dewiwusuxutez.iblogger.org/lutetidofopitemamodij.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://gonowaxavox.epizy.com/pnpa_application_form_download.pdfIn PDF document text
- https://s3.amazonaws.com/mesixadelomomo/airdrop_macbook_to_android.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e4db3a89-f576-474c-b2a3-8207a74f0963/applications_of_no_limit_holdem_audiobook.pdfIn PDF document text
- http://supuwevul.atwebpages.com/calculation_of_mean_median_and_mode.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/98712a31-0f7d-465f-849a-86f48bdf6797/fupejesafoxekitosulaf.pdfIn PDF document text
- http://wiviwadikifeged.epizy.com/basic_electrical_engineering_book_in_tamil.pdfIn PDF document text
- https://s3.amazonaws.com/jivagajamav/android_version_code_decimal.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a4616beb-2147-4f39-be7c-ad3bd47d5b02/48779109461.pdfIn PDF document text
- https://s3.amazonaws.com/mosezavor/topoxukutaxifozanewo.pdfIn PDF document text
- https://s3.amazonaws.com/jojitagifuva/wezesupano.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5d910100-d976-4245-b160-fc94097d5f40/what_size_tires_does_a_2013_ford_focus_have.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/534506b3-e828-4839-82ec-187e9a319eed/microsoft_enterprise_agreement_portal_login.pdfIn PDF document text
- https://s3.amazonaws.com/lopeteb/vavivomuxuvufukufubotevuw.pdfIn PDF document text
- http://kofaxafogi.myartsonline.com/82869665970.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_off00011218.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11218	5384 bytes
SHA-256: `4a0dfb50af350ef5fa961274c8d50e8fbb8fc08c568d513c2f3b7c9262079361`
`font_01_sfnt_off00012461.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12461	10964 bytes
SHA-256: `b22bf7037965fd813c0dcf099341d39db76dd1f6b2f8fae602a02de31b7b78f8`
`font_02_sfnt_off0001499c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1499C	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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