Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d2408141e36f5b…

MALICIOUS

PDF

76.2 KB Created: 2021-03-19 17:22:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4d11c32f209805a7849b17b64f141a2d SHA-1: c409f1e00809a433b25fc46df82970a59c0ab418 SHA-256: b4d2408141e36f5b56a2cedbd54de9dd8b39571a2a51eb49576c3e5667f3f0dc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external links, forming a link farm hosted on disposable domains, with one prominent URL being 'https://resalured.ru/wix?keyword=csr+2+hack'. The document's structure and embedded links suggest it is designed to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/wix?keyword=csr+2+hack PDF link annotation
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/xagivikifiviter.pdfIn PDF document text
    • https://loraxero.weebly.com/uploads/1/3/4/3/134332649/dofarudi.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/1844300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_6029495866d3a.pdfIn PDF document text
    • https://megewesaj.weebly.com/uploads/1/3/0/7/130738707/658829b4.pdfIn PDF document text
    • https://gelatotagubas.weebly.com/uploads/1/3/0/8/130813077/zovutobuvadew-jenirok-jonenopezegin.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/94587573931.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/2795752973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_6028bfad38f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445338/normal_604f64489c3fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagofij.onlinewebshop.net/hp_ultraslim_dock_2013_docking_station_d9y32aa_compatibility.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_b549ced26540486a95dceff67f53f251.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/709b620a-82f2-4fe5-add4-193fba2c10ca/sony_cyber-shot_rx10_iv_weight.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_253692df9b3248548cd8f6c75d606ee1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/044dba90-31ef-4ab0-b8b7-cd797583f5b8/o_que_colocar_no_curriculo_se_nao_tem_experiencia.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/71128998182.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_915b1c7976444049af42051e28b57880.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_116c66b647cc41da908a7197d7ec4e00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/633f3047-2ab7-4de5-b43c-52cb6fda3a97/how_to_stop_nec_phone_from_flashing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c35aa20-99f0-49c7-9e4c-5714b020fe61/nenezatoneno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2246de21-c047-4d15-9f5c-6dd8c16a0179/xokozobetokab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5048979b-d059-45af-bc67-3a41a4ed8387/jowugimadiva.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_8e005870a04f4ad39b63a6f9c68f5d18.pdf?index=trueIn 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.

FilenameKindSourceSize
font_00_sfnt_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 4956 bytes
SHA-256: acdbff0b4ceee80ecbdbadbdb63eb02c681940ad844aecbc186b52e7ea4facd8
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 10416 bytes
SHA-256: c2cef2bc1bfb8def776994b5558d08f13d4ebc11d6b25fc1ed1271fc710ec312

Open this report in the interactive analyzer, or submit your own file for analysis.